British heptathlon star Jessica Ennis

British track and field star and former World heptathlon champion

Jessica Ennis will be hoping the home advantage can help her win gold in London.

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal and Jennifer Oeser of Germany with bronze in the Women Heptatlon from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill of Great Britain is presented a gold medal from the 2011 Daegu World Championships. REUTERS/Phil Noble

World Athletics Championships

Athletics - World Athletics Championships – Heptatlon women – London Stadium, London, Britain – August 6, 2017 –Jessica Ennis of Britain is promoted from Silver to Gold in Heptatlon Women discipline from Daegu 2011. REUTERS/Phil Noble

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jennifer Oeser of Germany, receives her reallocated silver medal and Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jennifer Oeser of Germany, receives her reallocated silver medal and Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jennifer Oeser of Germany, receives her reallocated silver medal and Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, (R) receives her reallocated gold medal and Jennifer Oeser of Germany (L) recieves her reallocated Silver medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jennifer Oeser of Germany, receives her reallocated silver medal and Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

16th IAAF World Athletics Championships London 2017 - Day Three

LONDON, ENGLAND - AUGUST 06: Jennifer Oeser of Germany, receives her reallocated silver medal and Jessica Ennis of Great Britain, receives her reallocated gold medal for the Women's Heptathlon at the 2011 Daegu Championships during day three of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 6, 2017 in London, United Kingdom. (Photo by Richard Heathcote/Getty Images)

World Athletics Championships

Athletics - World Athletics Championships - Men's 100 Metre Final – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill presents a medal. REUTERS/Kai Pfaffenbach

World Athletics Championships

Athletics - World Athletics Championships - Men's 100 Metre Final – London Stadium, London, Britain - August 6, 2017. Jessica Ennis-Hill presents a medal. REUTERS/Kai Pfaffenbach

Team GB Homecoming Parade - Manchester

Jessica Ennis-Hill of Britain of Britain on stage. Action Images via Reuters / Craig Brough Livepic

Athletics - Women's Heptathlon 800m

FILE PHOTO: 2016 Rio Olympics - Athletics - Final - Women's Heptathlon 800m - Olympic Stadium - Rio de Janeiro, Brazil - 13/08/2016. Jessica Ennis-Hill (GBR) of Britain celebrates after the race REUTERS/Dylan Martinez

Athletics - Women's Heptathlon 800m

FILE PHOTO: 2016 Rio Olympics - Athletics - Final - Women's Heptathlon 800m - Olympic Stadium - Rio de Janeiro, Brazil - 13/08/2016. Jessica Ennis-Hill (GBR) of Britain celebrates after the race REUTERS/Dylan Martinez

FILE PHOTO - Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London

FILE PHOTO - Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London, Britain, November 30, 2016. REUTERS/Hannah McKay

Athlete Jessica Ennis-Hill holds her award after she was made a Dame CBE by the Duke of Cambridge during an investiture ceremony at Buckingham Palace in London

Athlete Jessica Ennis-Hill holds her award after she was made a Dame CBE by the Duke of Cambridge during an investiture ceremony at Buckingham Palace in London, Britain April 19, 2017. REUTERS/John Stillwell/Pool/Files

Athlete Jessica Ennis-Hill holds her award after she was made a Dame CBE by the Duke of Cambridge during an investiture ceremony at Buckingham Palace in London

Athlete Jessica Ennis-Hill holds her award after she was made a Dame CBE by the Duke of Cambridge during an investiture ceremony at Buckingham Palace in London, Britain April 19, 2017. REUTERS/John Stillwell/Pool

Team GB Homecoming Parade - Manchester

Britain Olympics - Team GB Homecoming Parade - Manchester - 17/10/16 Jessica Ennis-Hill of Britain of Britain on stage Action Images via Reuters / Craig Brough Livepic

Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London

Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London, Britain, November 30, 2016. REUTERS/Hannah McKay

Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London

Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London, Britain, November 30, 2016. REUTERS/Hannah McKay

Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London

Jessica Ennis-Hill poses at the ball for Britain's Olympic and Paralympic teams at Battersea Park in London, Britain, November 30, 2016. REUTERS/Hannah McKay

Tatyana Chernova of Russia celebrates winning the women's heptathlon with Jessica Ennis of Britain in Daegu

FILE PHOTO - Tatyana Chernova of Russia (L) celebrates winning the women's heptathlon with Jessica Ennis of Britain after their women's 800 metres event at the IAAF World Athletics Championships in Daegu, August 30, 2011. REUTERS/Phil Noble

Team GB Homecoming Parade - Manchester

Britain Olympics - Team GB Homecoming Parade - Manchester - 17/10/16 Jessica Ennis-Hill of Britain of Britain on stage Action Images via Reuters / Craig Brough