The couple, who already share two kids together, are expecting to welcome their third baby this December.
Chilingarov was born in the city then known as Leningrad to Russian and Armenian parents and spent much of his childhood in Russia's North Caucasus region. From the early 1970s he was in the forefront of Russian scientific achievements in the Arctic and Antarctic, a participant in missions to both poles and a proponent of emphatically staking Russia's claim to the Arctic. Duma speaker Vyacheslav Volodin said Chilingarov's achievements were "an example to us all."
Cyril Ramaphosa has led the ruling ANC to its worst result since it won the first democratic vote in 1994.