The late Steve McQueen on a Triumph in a classic scene from The Great Escape.
Zac Efron's "number one style icon" is Steve McQueen.
The 'Baywatch' star also thought the late king of pop, Michael Jackson was "crazily stylish".
He said: "Steve McQueen, he's my number one (style icon), he's just classic and cool and never tries too hard.
Popstar Michael Jackson Photo: AP Photo/Joerg Sarbach
"But on the other hand, I also love Michael Jackson. He was so crazily stylish, have you seen his clothes on stage? Unbelievable."
The 29-year-old actor - who is the face of a new Hugo Boss fragrance campaign - likes to rock a bomber jacket on his days off and he lives in black t-shirts.
He told fashionbeans.com: "On my days off, I'm usually working on something anyway, how sad is that? So it's pretty much what I always wear - jeans, a bomber, a T-shirt," he smiled. I haven't worn a tracksuit for, like, two-and-a-half years, but this year I'm going to take a break and chill out in one for sure.
"It might sound boring, but I really do live in black T-shirts. My life can be quite hectic, but with black T-shirts, I can run in them, but they're classy enough to go somewhere cool or to go to a meeting in. I own dozens."