The dynamic duo, however, recently decided to slow things down with an afternoon stroll. Walking hand-in-hand, the couple was smiling and chatting as they walked through the London town of Hampstead.
Earlier in the day, the Two and a Half Men star joined Kunis and her parents for a performance of Billy Elliott: The Musical.
It wasn't the first time Kutcher spent quality time with his girlfriend's family. Last summer, the 35-year-old cheered on the Los Angeles Dodgers with Mr. and Mrs. Kunis.
Looks like this couple continues to stay on a winning streak!