Even though we didn't know they were dating, they've just become our new favourite celeb couple!
Carice, 39, confirmed she is pregnant with her first child, and make a fun reference to her GOT's evil character Melisandre.
Taking to Twitter and Instagram on Saturday (19 March), she joked: "Yes. It's true. Let the shadow baby jokes begin."
She also thanked her fans for their "lovely wishes".
Carice plays the creepy Red Priestess in the epic HBO fantasy series, and in season two we saw her promise to give Stannis Baratheon, the Lord of Dragonstone, a son.
She did, of sorts, giving birth to a shadow creature in a cave who murdered the next in line to the Iron Throne, Renly Baratheon.
Ok. I'm ready for your shadowbaby jokes.— Carice van Houten (@caricevhouten) March 19, 2016
Dutch actress Carice met actor Guy last year when they filmed the movie Brimstone, due for release later this year.
Australian Guy, 48, became famous for his role as nerdy Mike in Neighbours, before becoming a successful Hollywood actor in films such as Memento, LA Confidential, Iron Man 3 and The Hurt Locker.
He split from wife Kate Mestitz in January 2015 after 18 years of marriage.
Nothing like the prospect of a shadowbaby to change your mind about becoming a Father !! https://t.co/JRjL6YISbl— Guy Pearce (@TheGuyPearce) March 19, 2016
After news of his impending fatherhood broke, he tweeted: "Nothing like the prospect of a shadowbaby to change your mind about becoming a father!"
Guy, who previously said he didn't want children, later wrote: "Thank you everybody for all your lovely messages xxx."
Game of Thrones season six premieres on HBO and Sky Atlantic on April 24.
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