Kate Hudson and her rocker fiancé Matthew Bellamy have announced the name of their new baby boy: Bingham.

The Muse frontman took to his Twitter account to reveal the name: "So happy! Just had a baby boy, Bingham 'Bing' Hawn Bellamy."

Bellamy also revealed a few more details from the birth on Saturday: "Mum and baby are strong and healthy. Mum was a warrior, Bing popped out after 4.5 hours of intense pushing!"

It is the couple's first baby. Hudson, 32, has another son, Ryder, with her ex-husband Chris Robinson. Hudson announced her engagement to Bellamy, 33, last April during a "Today" show interview with Matt Lauer.

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