The couple arrived at Heathrow airport on Monday evening (24 November) following Lewis' win at the Abu Dhabi Grand Prix on Sunday.
Formula One racing driver Lewis had a huge smile on his face as he made his way through the crowds, and no wonder he's so happy after his triumphant win over the weekend.
Lewis is now only the fourth British driver to win two world titles, having previously won in 2008.
Former Pussycat Doll Nicole was in the stands cheering Lewis on to victrory, and after he won, she even managed to steal a kiss amid all the excitement.
Nicole is currently living in London as she's rehearsing for her West End debut in Cats the musical.
'Run' singer Nicole will feature in the musical for a strictly limited 12-week run in December. We're sure Lewis will be in the audience cheering on his girl!
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!
Watch Nicole's video for 'Run' below: