Kim Kardashian and Lewis Hamilton seem closer than ever.

The American star posted a very affectionate selfie with the Formula 1 driver and his daughter Chicago, further fueling rumors about their relationship.

Kim Kardashian is no longer hiding her close relationship with Lewis Hamilton. The 45-year-old American star posted several photos on Instagram of a day spent at a lake with her children. One of the pictures is particularly striking: it shows the businesswoman embracing the 41-year-old British driver, while her daughter Chicago rests her head on her mother's shoulder.

This is the first photo showing Lewis Hamilton with one of Kim Kardashian's children. The other photos also reveal North, Saint, and Psalm, the four children born from her marriage to rapper Kanye West.

Speculation about a relationship between Kim Kardashian and the seven-time Formula 1 world champion has been circulating since February. After several public appearances together, including at the Super Bowl, Kim shared a first photo of the couple in April, before being seen in the Ferrari paddock in June.

Lewis Hamilton himself fueled the rumors recently at Silverstone. When asked by a fan about his apparent happiness, he responded by mentioning Ferrari before adding, with a smile: "And of course... it's Kim."

Recently, Lewis praised Kim on stage during the Formula 1 Grand Prix at Silverstone. A fan in the audience asked Hamilton, "You seem happier lately, what's the reason for that? Is it thanks to your girlfriend?" The driver first mentioned his enjoyment of being part of the Ferrari team, before adding, "And of course, of course, it's Kim."