Billie Piper's husband Laurence Fox has tweeted a picture of their newborn son's tiny feet as the couple revealed the baby boy's name.
The 29-year-old actress - already mother to three-year-old son Winston - gave birth to a healthy baby boy over the Easter weekend.
Laurence tweeted: "New baba is called Eugene Pip Fox. He's a little legend."
The Lewis star, 34, had previously joked that they would be calling him Steve Fish Fox after one of his friends, after fans began suggesting names on Twitter.
Laurence announced the birth on Twitter saying: "One born every minute. We had our minute today. Beautiful boy. Everything fine. Couldn't be happier."
Shortly after Winston's birth in 2008, Doctor Who star Billie revealed she was keen to have more children with Fox.
"I would like to have three children. I'm thinking of having two close together and leaving it a while, then having another," she said.
"It's really hard to put into words just how fantastic being a mum is. I really do love it. Life is so much better for having had Winston and I feel warmer as a person."
Billie, a former pop singer, married Laurence in 2007. She was previously married to DJ Chris Evans.