updated 05/21/2010 AT 11:00 AM ET
•originally published 05/21/2010 AT 1:35 PM ET
With three kids and another on the way, Matt Damon’s household is about to get even busier.
“We’re bracing ourselves for our next little tornado,” Damon told PEOPLE at Thursday night’s Save the Children’s Celebration of Hope fundraiser in Greenwich, Conn., where he was honored for his work with the organization.
“We’re excited,” said the actor, 39. “But it is a lot of work.”