Paul Bettany is one proud papa!

Jennifer Connelly and her hubby welcomed baby Agnes in May, and Bettany, 40, couldn't be happier with their family's newest addition.

"She's great. She's beautiful," the actor gushed to Us Weekly Monday at Montblanc's 24 Hour Plays on Broadway in NYC. "I have two boys who adore her. We've been blessed by a seven year gap." (Connelly has a 14-year-old son, Kai, from a previous relationship, while she and Bettany have an 8-year-old son, Stellan, together.)

"[Agnes] is so lovely," the Margin Call star said. "With my oldest, we play a lot of guitar together. With my youngest, at this point, it really is changing her diaper."

So what makes Connelly, 40, such a wonderful mom? "[Being a parent] needs to be the biggest focus of your life," her hubby told Us. "And it absolutely is the most important, biggest focus of my wife's life. She is amazing at it. It's not fake. Everyone says that, but it's actually really true. It's the most important thing in her life."