Jamie Dornanis reportedly in final talks to replace Charlie Hunnam in the upcoming "Fifty Shades of Grey" adaptation ... and we're 100% on board with this one.

The 31-year-old actor will play S&M obsessed billionaire Christian Grey in the flick, starring opposite Dakota Johnson.

But most of you probably have no idea who this guy is, right? Keep reading to learn 5 fun facts about your new Christian.

1.) He Has a Very Famous Ex

While he'll romance Anastasia Steele in the kinky movie, Dornan was once linked to famous actress from a very BIG movie franchise.

The Irish actor dated Keira Knightley from 2003-2005. The two met at a photo shoot and dated for about a year before going public with their relationship. 

2.) Sorry ... He's Still Off the Market

Though his relationship with Knightley fizzled in 2005, he's currently married to English actress Amelia Warner. The two tied the knot earlier this year and they're expecting a child together.

3.) He Looks Goooooood In His Underwear

Before he was an actor, Jamie was a model -- most famously appearing in a number of Calvin Klein ads in just his underwear. 

He also shared billboards with Eva Mendes for the brand and has modeled for Hugo Boss, Banana Republic and Zara.

Clearly he's comfortable with his body, which is very important for the role of Christian.

4.) He's a Real Lady Killer!

Want to see some of Dornan's acting? Check out "The Fall" on Netflix. Jamie stars as a serial killer on the BBC shows, which just got picked up for a second season. 

Gillian Anderson of "X-Files" fame also stars on the show as a detective tracking the killer.

5.) He Loves a Good Fairy Tale

Before landing a starring role on "The Fall," Dornan appeared on ABC's "Once Upon a Time" as the sexy Sheriff Graham Humbert ... better known as The Huntsman.

His character was killed off midway through Season 1, though he returned for a flashback episode in Season 2.

What do you think of Dornan's casting? Were you hoping for someone else? Sound off below!

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