The father of Minnie Driver's unborn baby has been revealed.

Minnie is reportedly expecting her first child with musician Craig Zolezzi, who she has been secretly dating for some time.

A source told Life and Style Weekly magazine: "They've been dating under the radar for more than a year. I think they made it exclusive when Minnie found out she was pregnant."

"She is telling friends she couldn't be happier that they are going to have a baby!"

The actress, who lives in Los Angeles, is said to be enjoying a long-distance relationship with San Francisco-based Zolezzi.

Zolezzi already has a son, Caden, from a previous relationship.

Minnie confirmed her pregnancy on a TV talk show earlier this year, but refused to reveal who the father was.

She said: "I figure, I'm the public person, and he can stay private."

The 38-year-old star is believed to be expecting a girl and is due to give birth in August.

A source said: "She wasn't planning to find out the baby's sex in advance, but she has a feeling it's a girl, so she's going with that feeling for now."