updated 04/21/2013 AT 10:30 AM ET
•originally published 04/21/2013 AT 4:00 PM ET
Stepping out at Saturday’s Summer of Sony promotional event, Damon, 42, joined director Neill Blomkamp and costar Sharlto Copley to amp up their upcoming sci-fi flick, Elysium.
Unlike White House Down costars Jamie Foxx and Channing Tatum, the actor didn’t put his dance moves on display. We’ll let it slide: Perhaps he was still tired from his St. Lucia celebration, which marked the 10 years he’s known his wife in a Jimmy Kimmel-officiated sunset ceremony.
“It was a very family-oriented and happy celebration,” a source told PEOPLE at the time. As for the loved-up couple, “They were smiling and looked very happy together.”