Matt Damon and Luciana brought their daughter Gia out for a walk in Boston today. The family is in his hometown, which means he won't be making it to tonight's event for his charity ONEXONE in SF. Fellow celebrity supporters like Charlize Theron, Josh Groban, and Jeremy Piven will be there to hold down the fort — stay tuned for our updates from the red carpet. Meanwhile, Matt and his girls are taking care of business back on the East Coast. Perhaps they'll have time to join the Garner-Afflecks for one of their adorable park playdates.