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Here is a picture of him from the first season of Chuck , probably before he realized he was the bees knees.
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Here's another one where his incredible nerd-charm was a little more subtle.
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But by the time this picture was taken, he knew. I mean, look at him.
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You can't sit there and tell me that you didn't want to be the lifeguard on stand-by for this photo shoot.
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How many nerds you know can pull off a super close-up?
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And another one, just for funsies.
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He's just dripping with CUTE NERD SWAG.
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Admit it. He's wearing a shirt with college spelled wrong just to be nerdy, and YOU DON'T CARE.
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Here he looks like a sad puppy dog and you want to know why so you can make it all better.
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You just want to be closer to the microphone and his nerdy, nerdy heart.
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And before you go saying "Zac's not really a nerd," you should probably know that he started his own brand. It's literally called NERD Machine.
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You know who else supports Nerd Machine and Nerd HQ? Zac's pal, Jared Padalecki. So there.
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ANYWAYS, he embraces the nerd.
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I mean even when he played a sometimes-jerk on Less Than Perfect , he was perfect.
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Other than being the cutest nerdy actor ever, he is an impressive ambassador for Operation Smile, a charity that literally heals children's smiles.
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And if that didn't make your heart the happiest it's ever been, this photo of him with a soldier really yanks at the heart strings.
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But just incase you needed another reason to adore Zac, he was the voice of Flynn Rider in Disney's Tangled .
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Here's a video of him smolder-ing several times, and you might want to turn on the fan.
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He also sang a song with Smash 's Katherine McPhee called "Terrified," which is about to become your new ringtone.
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Watch, if you want. AND OF COURSE YOU WANT.
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And he's currently starring on Broadway in the musical comedy "First Date," alongside another Smash alum, Krysta Rodriguez.
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Next up, watch his dashing, nerdy self tackle a superhero movie as Fandral in Thor: The Dark World .
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For which his contract stated that he had to color his hair blonde and pose for awesome pictures with Idris Elba.
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Live long and prosper, you adorably nerdy man.