Look, things seem to be getting pretty serious between Kim Kardashian and Lewis Hamilton!

Photo: Lewis Hamilton, Kim Kardashian/ X

Lewis Hamilton joined Kim Kardashian and her three youngest children on a trip to Japan, a source confirms to PEOPLE.

According to the source, the Formula 1 driver spent time with Kim Kardashian and her children: Saint (10), Chicago (9) and Psalm (6). Khloé Kardashian and her children, True (7) and Tatum (3), are also on the trip.

Kim Kardashian and her children are in Tokyo for spring break, along with Khloé Kardashian and her family, according to a source.

This trip comes after Kim and Hamilton were previously spotted together in several different places in recent months, including Paris in early February and Arizona in early March. They were also photographed together at a hotel in Paris and during a sunset walk at Lake Powell.

Another source tells PEOPLE that Hamilton is a laid-back, positive person, and that Kim’s family likes him. According to the same source, Kim is very interested in him, even though they both have busy professional commitments and try to find time for each other. Their relationship is described as more than just a casual acquaintance.

Rumors of a romance were also fueled by a flirtatious comment Hamilton left on a Kim Kardashian Instagram post after the 2026 Vanity Fair Oscars Party, to which he responded with a heart-eye emoji .

They have also been seen together at public events like Super Bowl LX in February, where they were photographed in the same place, further fueling speculation about their relationship. According to sources, there is a high level of comfort between them, as they have known each other for years, and Kim is said to feel safe and comfortable in his company.