(Cover) - EN Showbiz - Jennifer Garner and Ben Affleck are reportedly expecting a baby boy.

The Hollywood couple are already parents to two daughters; Violet, five, and two-year-old Seraphina.

A friend of the family told Life & Style magazine the news and says that Ben, 39, is happy to finally have a "little sports buddy" to bring up.

"He can't wait to take his son to baseball games and play catch with him," the insider told the publication.

But the prospect of having another male in the house apparently has Jennifer in a spin as she is not used to raising boys.

"She feels like she won't know what to do," the source said. "She's close to her two sisters, and her instincts were spot-on with the girls. But she never had a brother and doesn't know the drill."

Jennifer told Ellen DeGeneres last month that her daughters "don't really care about the gender as much, as long as we name it what they want it to be named."

The actress grew up with just females in the home and although she said she'd be happy either way she added that "three girls is a great way to grow up". (C) Cover Media