Guy Pearce and Carice van Houten Welcome Son Monte

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It’s another Game of Thrones baby!

Carice van Houten, who plays Melisandre on the hit HBO series, has welcomed her first child with her partner, Australian actor Guy Pearce, they announced on social media Monday. Son Monte arrived last week in Amsterdam, van Houten’s rep tells PEOPLE.

“A cute little package arrived and told us his name’s Monte Pearce,“ Pearce, 48, wrote, tagging van Houten, 39, who responded in kind with emojis. “We think we’re gonna keep him. Placenta smoothie anyone?”

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PEOPLE exclusively confirmed the news that the couple were expecting in March. The couple also took to Twitter to make “shadow baby” jokes, as well as to celebrate the birth of their son.

Houten also tweeted a baby-bump selfie in July, captioning it, “Almost don’t fit the mirror anymore” and tagging Pearce.

Aside from her high-profile GoT role, Houten is also a singer. Earlier this year, she starred in the sports biopic Race alongside Stephan James, Jason Sudeikis and Jeremy Irons.

Emmy winner and philanthropist Pearce has starred in films such as Memento, The King’s Speech and The Hurt Locker, as well as appearing in this summer’s Genius as F. Scott Fitzgerald. He’s also a musician, who released a 2014 album titled Broken Bones.

— Jen Juneau with reporting by Sarah Michaud