Kate Winslet has called her third child Bear, a spokesperson has confirmed.
The Revolutionary Road actress gave birth to her new baby son on December 7 in a Sussex hospital and according to The Sun, she has settled on the unusual name for him.
A source told the paper of Kate and her husband, Ned RocknRoll: "They are doing well, they both absolutely adore him - and the name Bear."
Kate, 38, has a 13-year-old daughter, Mia Honey, with first husband Jim Threapleton, and a 10-year-old son, Joe Alfie, from her second marriage to Sam Mendes.
It is thought that Bear has taken his mum's surname rather than RocknRoll.
Kate hasn't changed her name to RocknRoll either and recently told Us Weekly: "I was never going to change my name to Rocknroll. I've never changed my name to anything so I didn't see a reason to start now."
Ned, Richard Branson's nephew, works for Virgin Galactic and met Kate while they were on holiday on his uncle's privately-owned Necker Island.
The couple got married in secret on the island last December, after a whirlwind romance.