A representative for the 26-year-old actress confirmed that Amurri wed Fox Soccer Channel commentator Martino at an event hosted by Sarandon and her ex-partner Tim Robbins, who raised Amurri for much of her life.
The couple announced their engagement in December 2010 and chose to marry in Charleston, where Martino's parents reside.
The celebrations reportedly included a cocktail party, black tie dinner and a scavenger hunt.
Sarandon recently described her new son-in-law as 'fabulous' and 'so much fun'.
Sarandon and Amurri starred together alongside Goldie Hawn in the 2002 romantic comedy The Banger Sisters.