Case in point? The couple says they've trained their own two-year-old daughter Lincoln to say a couple of the HBO hit's most memorable lines.
"Our oldest one is talking a lot now, and obviously the things that she parrots are hilarious," Dax, 40, explains in a new Q&A with People. "We're big Game of Thrones fans, so we've trained her to say, 'Winter is coming.' And, 'You know nothing, Jon Snow.' These are catchphrases of hers. You know, standard stuff like that."
"We dress her up in Jon Snow's outfit -- I should say Kristen dresses her up in Jon Snow's outfit,'" he adds.
The 34-year-old Frozen actress does seem pretty dedicated to turning little Lincoln into Kit Harington's much-loved character!
"I got her a pretty cool chainmail suit with a big sword and a hood and a nice sort of felted, fake-fur knight-watch cape, and I made her stand on her (Shepard: castle-shaped jungle gym) and she didn’t understand a lick of it, but it really made me happy," she says.
Kristen and Dax are just two of the many celebs who are proud Game of Thrones fans. Earlier this month, Emilia Clarke hilariously revealed to Harper's Bazaar that Channing Tatum and Jenna Dewan are such big fans, they even have Game of Thrones-inspired pet names for one another.
"I was at a Golden Globes after-party and Channing f**cking Tatum came up to me, and his stunning missus, Jenna," she recalled to the magazine. "And they said, 'We call each other 'moon of my life' and 'my sun and stars' and all that.' And I was like, 'I cannot contain this. Please, can we all have something sexual together? You're both beautiful, even just a hug.'"