Brian Austin Green attends Generosity Water presents the 5th Annual Night Of Generosity at Beverly Hills Hotel on September 6, 2013 in Beverly Hills, California. Credit: Michael Bezjian/

Brian Austin Green is ready to pull double baby duty! The 40-year-old actor and wife Megan Fox -- already parents to son Noah Shannon, 11 months -- are expecting another addition, and the former Beverly Hills, 90210 star is doing everything he can to be a supportive husband.

"I do whatever she asks for and I say yes no matter what it may be!" he said at Generosity Water's 5th Annual Night of Generosity event in Beverly Hills Friday, Sept. 6. "She's doing great. She did great the first time around, but I wouldn't wish the experience on anybody! I couldn't do it! I couldn't make a baby, it's unbelievable!"

Dressed in a black pinstriped suit and skinny tie, Green stepped out for the evening sans his pregnant wife, and admitted they don't have their hearts set on a boy or a girl. "I'm [just] hoping for a healthy baby," he said.

Green and Fox, 27, have been together since 2004 and married in 2010. They welcomed little Noah in September 2012. With the new baby's arrival, the couple will juggle two kids under two and Green's role on the FX sitcom Anger Management. "I have to say, we honestly have no idea and we discuss it daily and think, 'How are we going to do this?'" he said. "I think we'll just see when it happens. People do it all the time."