Los Angeles, California - Kim Kardashian's boyfriend, Lewis Hamilton, joined in on celebrating her sister, Kylie Jenner, on her 29th before the couple jetted off to Hawaii!

The British racer has clearly gotten the approval of Kimmy's sisters, as he took part in celebrating the Khy founder's recent birthday.

Per Kylie's latest Instagram post, which she captioned "hello 29," Lewis is seen taking the birthday girl for a spin in a yellow-and-black UTV buggy while Khloé Kardashian shouts in the background, "Birthday ride!"

The Ferrari driver is filmed taking off onto the dirt track before accelerating in the distance.

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Additional footage shows Kylie posing with her sisters, including Kendall Jenner, decked out in an all-black athletic 'fit and face coverings, along with scenic images of a waterfall and beach.

Lewis later shared a photo dump on his page from a recent trip to Hawaii, where he also snuck in a picture of what appears to be Kim on a swing as he stands behind her.

Lewis spent time with Kim's family during the July 4 holiday at Lake Coeur d'Alene in Idaho. Jacob Elordi, who's dating Kendall, was also seen hanging out with the famous clan there!