Popsugar Celebrity Zac Efron Are Zac Efron and Alexandra Daddario Dating? Zac Efron and Alexandra Daddario "Aren't Officially Dating," but These Photos May Prove Otherwise April 7, 2018 by Monica Sisavat Solís First Published: April 2, 2018 View On One Page Photo 10 of 11 ADVERTISEMENT () Start Slideshow #tbt Baywatch press. Smile. It's contagious 😀📸credit me. A post shared by Zac Efron (@zacefron) on Sep 28, 2017 at 3:32pm PDT Share This Link Copy ← Use Arrow Keys → 10 Previous Next Start Slideshow Zac EfronCelebrity InstagramsCelebrity CouplesAlexandra DaddarioCelebrity Facts