The Iron Man 3 star added: “Placenta smoothie anyone? @caricevhouten [sic]”

The name Monte, according to Nameberry, is “an old-fashioned nickname-name that's reclaiming a certain amount of dash and charm”.

It comes from the French name Montague, which means ‘pointy hill’.

Van Houten and Pearce announced their pregnancy in March earlier this year, with the actress cracking more than a few Game of Thrones-related jokes about her upcoming arrival.

Confirming the news on social media at the time, she quipped: “Yes. It's true. Let the shadow baby jokes begin.”

To which Pearce replied: “Nothing like the prospect of a shadowbaby to change your mind about becoming a father!”

Carice van Houten – aka Game of Thrones’ Melisandre - reveals baby boy’s unusual name