From A-listers like Vanessa Hudgens and Lily Collins to Halston Sage and Michelle Rodriguez, the actor certainly knows how to pick 'em.
MORE: Watch Zac Efron Transform Into a Gosh Darn Smoke Show Right Before Your Eyes (May we never forget this moment at the 2014 MTV Movie Awards.
After their break up, he went on to date Sami Miro and be linked to a number of other gorgeous women in Hollywood.
Now, after his appearance at the MTV Movie and TV Awards over the weekend, his fans are convinced that he's got a new girlfriend.
Hopefully, Zac and Alexandra give their fans a few more hints if they really are together.
There's no denying that they would be H-O-T together.
In addition to making us swoon, the 29-year-old has had quite an impressive dating résumé.Fuel was only added to the fire when straight-up asked Zac about the dating rumors in May 2017 and he responded with, "As far as I know, she hasn't said yes." MORE: See How the Cast of the 'Baywatch' Movie Stands up to the Cast of the Classic TV Show! Alexandra told at this year's Billboard Music Awards that "I understand why people would go crazy over something like that, but Zac and I are very good friends." Surrreeee. In the snap, the gorgeous actress is cozied up in bed and you can CLEARLY see Zac through the mirror — and to top it all off he captioned the image, "#tbt Baywatch press. It's contagious." This comes on the heels of the 2017 MTV Movie & TV Awards, where the duo seemingly couldn't keep their hands off each other. Rumor has it the stars are dating after meeting on set, and this behind-the-scenes pic sure isn't silencing those rumors.Alex captioned the photo, "@mtv movie and tv awards backstage shenanigans with @zacefron #Summerand Brody #Baywatch." “Everyone is buzzing that Zac Efron and Alexandra Daddario are secretly seeing each other and have been doing so for months," a source told The insider added, "She thinks he is super sexy, smart, hilarious and loved working with him.