On the show, she's a fiery bleach blonde-haired dragon wielder.
In real life, you probably wouldn't recognize the actress.
Here's Clarke on HBO:
HBO / YouTube screencap
And, here she is off the set sporting her natural brunette locks:
Stuart Wilson / Stringer
Again, Daenerys:
And, Clarke:
Christian Augustin/Stringer
You could probably walk right by her on the street and never notice it's the same person.
Clarke admitted in the March issue of GQ that's what happens when she's not filming.
"It takes a die-hard fan to actually spot me," said Clarke. "These HBO events, where I’ll be talking to someone for a fair amount of time ... they think I’m some crazy Brit who snuck her way into a Hollywood party.”
The actress says she'd love to wear the wig off set, but HBO won't allow it.
"I keep asking to go out with the wig at night, but they insist there’s no way," said Clarke. "They won’t let me go partying with it on! I would be killed on the spot."
"Game of Thrones" returns to HBO at the end of the month on March 31.
Check out more of Clarke in her GQ Photo Shoot below: