Kim Kardashian, Lewis Hamilton Go Instagram Official

Kim Kardashian and Lewis Hamilton might have the formula for a racing romance.

Months after sparking dating rumors, the Kardashians star and the seven-time Formula 1 champion seemingly went Instagram official.

In an Instagram video shared by Lewis, 41, April 6, he raced through the streets of Tokyo in a red Ferrari car. As he drifted the vehicle, Kim, 45, was revealed to be sitting in the front passenger seat.

And when the SKIMS founder was asked what she thought of the experience, she replied with a smile, “That’s insane.”

Indeed, Kim joined Lewis in Japan as he prepared for the Japanese Grand Prix last month, shopping around Tokyo with her sister Khloe Kardashian. Kim’s kids North, 12, Saint, 10, Chicago, 8, and Psalm, 6— who she shares with ex-husband Kanye West—were also along for the trip, as Kim posted about on Instagram at the time.

Kim and Lewis first sparked dating speculation in January, when they were spotted at the same New Year’s Eve party in Aspen, Colo. Rumors were further fueled the following month, when the pair were spotted hopping on a private flight from U.K. to Paris together.