The engaged lovebirds proved they are quite the dancing pair as they attended the actress' uncle's birthday bash on Saturday evening at the Premier Russian restaurant in Studio City, Calif.
The Two and a Half Men star smiled widely as he hit the dance floor with his fiancée. The 36-year-old sported a blue dress shirt and jeans, while the 30-year-old donned a white dress for the celebration.
According to an eyewitness, the That '70s Show co-stars were engaging in some PDA and didn't hold back showing their affection for one another in front of their loved ones.
Kutcher and Kunis left the party at around 1 a.m. and were spotted saying their goodbyes and hugging family members. Kutcher embraced the birthday boy before the pair took off in their car.
Kunis accentuated her killer legs in a belted denim dress paired with red sky-high red heels, while Kutcher was dressed casually in a Chicago Bears T-shirt and baseball cap.