Matt Damon changed into a suit for the premiere of Contagion in Venice this afternoon. His wife, Luciana, was by his side for the red carpet event and sparkled in a gold gown. Matt had his other leading lady, Gwyneth Paltrow, there for this morning's Contagion photo call at the Venice Film Festival, where they were joined by director Steven Soderbergh and costars Jennifer Ehle and Laurence Fishburne. Matt will be on the go again soon, since he'll be showing off the movie at the NYC premiere next week. Gwyneth, though, isn't expected to attend the Big Apple event.