The happy news was spilled by the 45-year-old actor’s former Gossip Girl co-star Kelly Rutherford.
Kelly was listing off celebs that will be attending her charity event next month in an interview with Us Weekly.
“Marcia Cross, Ed Westwick, Vivica Fox, Selma Blair, and Lisa Rinna are all hosting. And Marianne Williamson and Lisa Bloom are speaking,” Kelly said. “I’m hoping Matthew can make it. He’s getting ready to have a baby, so I don’t know… His loss!”
This is the second child for Matthew. He shares a six-year-old daughter with his ex-wife, model Naama Nativ. They split back in February 2010.