Zac Efron

The 'High School Musical' co-stars dated for roughly four years.

From Nick Jonas to Khloe Kardashian and beyond, check out 30 surprising celebrity glow-ups over the years.

'Extremely Wicked, Shockingly Evil and Vile' hits Netflix and select theaters May 3.

Efron plays one of the most notorious serial killers in history in the new Netflix movie.

I mean, I see the resemblance.

From Lady Gaga and Bradley Cooper to Lana Condor and Noah Centineo, these celebrity pairs have chemistry onscreen and off.

From Joe Jonas to Joe Alwyn, these are the men the famous pop star has been linked to.

See how Adam Brody, Jesse Bradford, Josh Hartnett and more resident hotties of the '00s have aged since their heyday.

From Zayn Malik to Justin Bieber to Taylor Swift, these celebrities dish on what it was like experiencing their first kiss.