Michael Phelps' new girlfriend Megan Rossee

Michael Phelps has allegedly been dating 25-year-old cocktail waitress Megan Rossee for five months. Rumors began circulating when she tweeted a picture of herself with Phelps and his four gold medals from the London Olympics. -- By Carla Thorpe, Yahoo! Sports

Megan Rossee tweets this image of herself and Michael Phelps with the caption, 'Yay Michael :)' 06.08.12 Supplied by WENN.com WENN does not claim any ownership including but not limited to Copyright or License in the attached material. Any downloading fees charged by WENN are for WENN's services only, and do not, nor are they intended to, convey to the user any ownership of Copyright or License in the material. By publishing this material you expressly agree to indemnify and to hold WENN and its directors, shareholders and employees harmless from any loss, claims, damages, demands, expenses (including legal fees), or any causes of action or allegation against WENN arising out of or connected in any way with publication of the material.

Speedo Athlete Celebration

Megan Rossee and Michael Phelps attend the Speedo Athlete Celebration at Kensington Roof Gardens on August 6, 2012 in London, England. (Photo by Tim Whitby/Getty Images for Speedo)