The 28-year-old star shared a picture of himself with his dog on Instagram in which he called him "Puppy Efron."
"Through thick and thin you've always been my best friend. I'll see you at the finish line, RIP Puppy Efron," Efron captioned the photo in which his dog is seen licking his face.
The "Neighbors" star continued writing, "Felt hog tied ever since my dog died. He lived to 84, damn, that's a long ride. I know he up there he just sit and he wait. I'll be racing up the stairs I'm gonna get to the gate singing- Chance the Rapper."