Matt and Don were this week guests of their pal George at his Italian hideaway villa in Laglio, Lake Como.
The pair were spotted going for a boat ride, joined by their families. Matt's Argentinean wife Luciana Bozan Barroso kept a watchful eye on their three-year-old daughter Isabella.
Also there was Don's actress partner Bridgid Coulter with their children - daughters Ayana Tai, 13 and 12-year-old Imani.
There was no sign, however, of their host. If recent appearances are anything to go by, the Hollywood hunk is enjoying some alone time with new woman in his life, Sardinian model and TV presenter Elisabetta Canalis.
The actor reportedly whisked the brunette back to his lakeside home just days after they were introduced by friends.