Joseph Gordon-Levitt is a married man

Actor Joseph Gordon-Levitt attends the premiere of "White Bird In A Blizzard" at ArcLight Hollywood on Oct. 21, 2014, in Hollywood, California.

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Surprise! Joseph Gordon-Levitt is a married man.

The "Don Jon" and "Sin City: Dame to Kill For" star quietly married girlfriend Tasha McCauley on Dec. 20, People reports.

The 33-year-old actor and McCauley reportedly said their "I dos" at their Los Angeles home.

Gordon-Levitt has rarely spoken publicly about his romantic life, but in 2013 opened up on "The Howard Stern Show" about his love, whom he did not identify at the time.

"I have a girlfriend but I tend not to really like to talk about it in public," he said, saying that she was "not in show business" and that they met through "mutual friends." "The girl that I'm with, she really doesn't want to be a part of it and you can imagine not wanting to have that kind of scrutiny."

He also discussed marriage and the possibility of starting a family. "I think that I could partner up with somebody -- I don't know who that somebody is -- I could partner up with a woman and commit to we're going to raise a family, and that's a project we're going to commit to for 20-something years."

Who is McCauley? She happens to be one smart cookie! She is the co-founder and CEO of the Silicon Valley-based robotics company Fellow Robots.

Congratulations to the newlyweds!

Gordon-Levitt isn't the only celebrity who tied the knot this year. Find out who had the biggest weddings in 2014.