Zac Efron opened up in a confessional new interview.

The 36-year-old Iron Claw actor sat down for a conversation with Variety. During it, he touched on a range of topics.

He spoke about the loss of Friends icon, Matthew Perry, who he shared the screen with in 17 Again. Zac also revealed that he is in regular contact with three fellow actors, and the list was a little surprising.

On the topic of Iron Claw, the movie star spoke candidly about transforming his body to play a professional wrestler. He also explained how his process was different after the dramatic and “stupid” process of toning up for his movie Baywatch.

Zac even shared some advice that he wishes he could give his younger self. What would he tell the star who became a household name after High School Musical took off?

Scroll through the slideshow for the biggest takeaways from Zac Efron’s interview…