Zac Efron

PICS: ET Birthday Babes

Click through our Birthday Babes gallery to find out when your favorite celebs celebrate their big day this year!

Is That Weed on the 'Neighbors' Set?

ET's Brooke Anderson drops in on the Neighbors set with Seth Rogen and Zac Efron to get the skinny on their upcoming comedy -- and why they're surrounded by loads of smoke and weed!

When Seth Met Zac: Love or Hate at First Sight?

What was Seth Rogen thinking when he first met his Neighbors co-star Zac Efron almost 10 years ago? The two field a Twitter fan question -- with amusing results -- at SXSW!

'Neighbors' Pals Praise Zac's 'Chiseled Chest'

Neighbors stars Seth Rogen and Zac Efron and their co-stars sharelaughs with ET about the movie's nudity, Zac's "chiseled chest" -- and whether or not he'll be a "man of his word" and show up at the MTV Movie Awards to accept an award shirtless!

Zac Efron Is '100 Percent' Up for a 'HSM' Reunion

Are you ready for a High School Musical 4?!

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Stars at South by Southwest

Check out all the biggest stars currently taking over the annual South by Southwest Music, Film + Interactive Festival in Austin, TX!First up are Zac Efron, Seth Rogen and Dave Franco, who premiered their upcoming comedy Neighbors on March 8, 2014. Neighb