Hollywood hunk Matt Damon's wife LUCIANA hasn't even given birth to their daughter yet, and he's already planning playdates with pal Ben Affleck's daughter VIOLET. The OCEAN'S TWELVE star is awaiting the birth of his first child next month (JUN06) - a little sister for Luciana's eight-year-old daughter ALEXIA from a previous relationship. Damon's close pal and Good Will Hunting co-star Affleck and wife Jennifer Garner welcomed Violet in December (05). Damon enthuses, "We're due in mid-June, but who knows? We could be now. "Yeah, they (my daughter and Violet) will have playdates. All we have to do is end up living in the same city!" The actor admits he is thrilled he is having a baby girl, because his step-daughter Alexia didn't want a brother. He says, "Believe me, if it was a boy it would have been a big problem. She wasn't having it. She definitely wanted a sister."