The two attended the MTV Movie & TV Awards on Sunday to promote their upcoming film Baywatch, where they showed off their close bond.
While the two walked the red carpet separately, they caught up with each other inside, sitting next to each other during the ceremony and snapping plenty of photos together.
Daddario, 31, posted a photo to Instagram of Efron, 29, giving her a sweet kiss on the cheek.
The pair also snapped a photo with Stranger Things star Millie Bobbie Brown after presenting her with the best actor in a show award.
From Coinage: See Where 6 Stars Were Before They Were Famous
And while Brown is seen resting her head on Efron’s chest, it was the actor who declared himself a “fan boy.”
Baywatch hits theaters May 25.