Apparently Heat magazine's readers agreed, dubbing Zac the "Hottest Hunk of 2014." He unseated last year's winner Tom Daley to take the top spot, and also beat out David Beckham and Leonardo DiCaprio.
Speaking of bringing on the, um, heat, Zac went shirtless again when he scaled down a cliff in New York with thrill-seeking host Bear Grylls, with both guys stripping off their tops before they kicked off the daring challenge.
Even though that looked fairly scary, Zac told a fan on Twitter that the creepiest challenge the duo did together was their freefalling experience. "Skydive from the helicopter was a rush- 8 sec free fall felt like 20 mins," he said.
He kept his shirt on for that one, but months before that, Zac was on land showing off his bod again, when he won best shirtless performance at the MTV Movie Awards in May.
What do you think? Is Zac the hottest hunk around? Tell us what you think in the comments!