Pakistan, Feb. 11 -- Lewis Hamilton is proving he's more than just a high-profile rumoured boyfriend - he's part of the Kardashian family fun too.

The Formula 1 superstar recently joined Kim Kardashian and her sisters, Khloe Kardashian and Kylie Jenner, for a low-key night in and fans got a glimpse of his hilarious side thanks to videos shared on Instagram.

The clip - shared by Kim, Khloe and Kylie on their Instagram on Monday - showed Kim attempting the popular Titanic couple challenge, with her sisters Khloe Kardashian and Kylie Jenner - who were trying and failing to lift her.

In the background, fans quickly noticed Lewis' unmistakable British accent cheering her on.

"Push away, push away!" a male voice shouts, followed by laughter...