Joseph Gordon-Levitt Is a New Dad!

The '500 Days of Summer' star welcomed his first child.

Joseph Gordon-Levitt is officially on daddy duty!

The 500 Days of Summer star and wife Tasha McCauley welcomed their first child, a baby boy, the weekend of Aug. 15, his rep confirms to ET.

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The actor and technology entrepreneur, both 34, were able to keep their baby news a secret just like they did their Dec. 2014 wedding at their Los Angeles home. The pair had reportedly been dating since 2013 when they decided to tie the knot.

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

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"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."

It's pretty impressive how JGL has managed to keep his private life private while maintaining a good rapport with the press. ET has watched him grow up, and was with him at age 14 when he starred in 3rd Rock From the Sun. Check out his adorable