Safe to say these two are officially expert wedding guests—so when will they take their own trip down the aisle?!

Ashton Kutcher took girlfriend Mila Kunis to his twin brother Michael's wedding, which took place on Saturday, Feb. 1 on St. Simon Island, Ga.

The Two and a Half Men stud's sibling wed Kate Hightower at a private home in front of the couple's closest family and friends, who were all present during the intimate affair to celebrate the lovebird's nuptials.

According to a source, Kutcher seemed very "chill and comfortable" during the "I do's," and, although it's unclear if he served as the best man, he was seen standing with a group of five guys dressed in simple white shirts and bow ties.