Rebecca Romijn loves blood and guts.

“I am a lifelong horror and gore fan,” she tells The Post. “And I’ve never gotten to work in the genre.”

Now she has. In the horror-comedy “Satanic Panic,” out Friday, she plays the bombshell leader of a devil-worshiping cult that seeks to turn a virgin pizza delivery girl into a blood sacrifice. Shockingly, for one of the sexiest women in the world, the project was a long time coming.

“I grew up going to the video store every weekend with my best friend,” says the former model, now 46. “We rented every single video off the horror and gore wall. We ran the gamut — all the way down to ‘[The] Toxic Avenger’ and ‘Faces of Death.’ ”

Making a horror flick of her own, she says, “felt like something I had always wanted to get out of my system.”

Fulfilling her freaky fantasy was harder than she suspected, in a surprising way: Romijn had to learn a whole new pagan language.

“There’s a dialect in there, an ancient dialect,” she says. “It just looked like gobbledygook to me.” She says that when she asked the director if she could make it up, she was told it was an actual dialect, “so I had to learn it word-for-word.”

Is Romijn now fluent in hell-speak?

“I got a summary,” she says.

The film also gave her the chance to appear on-screen with Jerry O’Connell, her real-life husband of 12 years, and the father of their twin girls. Unlike many Hollywood couples, this pair loves working together, mostly.

“When we did ‘Love Locks’ — that was three and a half weeks of shooting — I think we only had one fight,” she says. “That’s pretty good for a married couple who’s sharing a dressing room, sharing a ride to and from work every day and sharing a hotel room.”

They have only one scene together in “Satanic Panic,” and there were no squabbles, she says. In fact, they even saved the indie film a buck or two.

“It’s so funny how productions get to save on transportation and hotel rooms, dressing rooms, since they always put us together,” she says, quickly adding, “which is totally fine!”

One of her major Hollywood achievements is being at the forefront of the comic book movie phenomenon. She starred as Mystique in 2000’s “X-Men” years before the Marvel Cinematic Universe came to be, and she has complicated feelings about the genre’s dominance today.

“I’m proud to have been a part of the inception of it,” she says. “Is it too much? I’m not sure. I think it’s come at a time when audiences need that kind of escape.”

Would she do another?

“Sure,” she says. “There are so many comic book movies, so it’s not quite as special as it once was.” But, then again, she says, “Work is work.”