Of course, Kimmel had to put Zac to the test, with a competition to see who could unhook four bras the fastest.
Last week, Zac Efron was seen touting his bra unhooking skills during an interview, so Jimmy made sure Zac was more than just all talk.
Jimmy and Zac had one additional challenge - they had to unhook the bras from Kimmel's sidekick, Guillermo!
Zac notes at one point: "You're a little bigger than most of the girls I've done this to."
Zac went with the slicked back hair, shiny suit and skinny tie look - what do you think of his style?
During the interview, he takes a walk down memory lane, noting that his first acting role was on 'Firefly,' for "a couple thousand bucks."
Zac also says he skipped college and went to "a musical highschool" instead!
We also get a little bit of info about Zac's younger brother, who actually "round-house kicked me to the face, with cowboy boots... and knocked out my two front teeth," he explains.
Zac said, "I was pissed," sharing a photo - aw, cute.
At the Hollywood premiere of 'The Lucky One,' Zac spoke with People.com about his love scenes with costar Taylor Schilling: "From his past films, [director Scott Hicks] is incredible with capturing the love in those scenes. Everyone builds those scenes up. There is sort of a fear inherent in everyone else so me and Taylor weren't afraid at all."
Taylor shared, "I was very nervous. I met Zac in hair and makeup and we just hit it off immediately. It was just very easy and that sort of click is something you can't describe but you just really hope for, because then it just makes the process really easy. I feel lucky to count him as a friend."