The High School Musical heartthrob looked happy and healthy during an appearance on US breakfast TV this morning to promote upcoming bromance comedy That Awkward Moment.
"I'm in the best place I've ever been," he told Today.
"I've never been this happy before. I'm extra grateful for these guys [his Awkward Moment] co-stars and to be here promoting this movie. Things are good. Thank you for asking."
In September 2013 it was reported Zac had privately completed a voluntarily stint in rehab earlier in the year. He has not publicly commented on the claims, but sources suggested it was due to an increasingly heavy partying lifestyle.
Then, the following month, Zac had his jaw wired shut when he broke it after slipping in a puddle outside his home.
After a difficult few months no doubt Zac's fans will be thrilled to hear he's back to his best.
Zac was pictured arriving at the Today studio in New York bundled up in a heavy coat and beanie hat and, even though he was wearing shades, he definitely didn't slip by unnoticed when it came to the fans outside...
He tweeted after his interview: "Thanks guys at the @TodayShow for hanging in there when it got crazy on the way out. ;-) And shout out to the NYPD for keeping us safe. It means a lot. #awkwardtour #thatawkwardmoment."
That Awkward Moment opens in UK cinemas on 29 January.