'Clowning Around': Zac Efron Posts Happy Snap With That Awkward Moment Co-Stars Amid Rehab Reports

Zac Efron has posted a cheery photo to his WhoSay account amid reports the actor checked himself into rehab just five months ago.

The High School Musical star appears to be back on track judging by a photo posted on his WhoSay account on Tuesday which sees Zac "clowning around" with his co-stars from upcoming movie That Awkward Moment.

Formerly titled Are We Officially Dating? the film sees Zac star alongside Michael B. Jordan, and Miles Teller as three best friends who make a pledge to stay single for as long as possible when one of them is left heartbroken by a breakup. The plan gets derailed though when they each fall in love.

It looks like the trio have become firm friends with Zac posting a pic of them having fun at a  photoshoot, captioning the snap:

"Me, @michaelb4jordan and @Miles_Teller clowning around at the #ThatAwkwardMoment photo shoot. New name, old crew. Check it out in theaters JAN 31st. - Z"

Clowning around! Zac strikes a pose with his That Awkward Moment co-stars (Zac Efron/WhoSay)

Fans of Zac have been rocked by shock claims this week that the former Disney star completed a stay in rehab five months ago, according to TMZ.

Zac, 25, is alleged to have checked into a treatment facility to deal with a cocaine problem, with a source claiming that the actor also experimented with MDMA.

It sounds like the actor is on the road to recovery though as he looked great when he posed on the red carpet at the Toronto International Film Festival just last month:

"He's healthy, happy and not drinking. He's taking time to focus on working," a source has told E! News of the star's current state of mind. While another insider told People magazine: "He’s doing great. He's taking care of himself and it shows."

Whilst making his appearance at the TIFF to promote his latest movie Parkland, Zac told reporters: "I'm good, real good." It was alleged earlier this year that Zac missed a few days while filming Seth Rogen's new comedy Neighbors in April. "It was common knowledge he was struggling with cocaine," a film source told TMZ.

Woops! BBC News Reader Mistakes Photocopier Paper For iPad Live On Air! (VIDEO)
Harry Potter Producer: 'JK Rowling's New SpinOff Will Be Very, Very Special'
'Her Body Looked Like Hell': Cher Slams Miley Cyrus' Twerking MTV VMAs Performance