Dwayne Johnson gives Beau Ryan a pretty horrifying 'Baywatch' haircut: Watch!

Dwayne "The Rock" Johnson may be a legendary pro wrestler and world class action film star, but a barber he is not.

The Baywatch star proved just that when he conned The Footy Show's Beau Ryan into allowing him to shave his head on Thursday's episode. It all started when Beau asked The Rock how he could be in Baywatch. Which also involved Beau plopping his leg onto The Rock's lap and asking him to feel his thigh muscles, naturally.

The Rock might want to consider sticking to his day jobs. Image: Getty

"If you want to be on Baywatch, we are going to need to shave that s--t off your head," The Rock said. Beau memorably dyed the tips of his hair for pop star Justin Bieber, so how bad could a haircut be?

The Rock works his magic on The Footy Show's Beau Ryan. Image: The Footy Show

The answer? Really, really bad.

Suspiciously, Beau asked a producer off camera, "I'm not shaving my head - am I actually shaving...?" He eventually agreed to do it, and things appeared be going well as The Fate Of The Furious star started shaving with the shears.

Beau moaned "oh yeah" in approval, to which The Rock barked back hilariously, "Don't make that noise man - it's just a f--king haircut!"

Daring to up the ante, The Rock removed the guard on the shears to get an even closer shave as Beau quipped, "Woah a lot came out before ... it's short now."

Then the Rock gave Beau a hand mirror to check out his handiwork.

"Are you serious? I'm doing baby photos next week!" the TV presenter said in shock.

"Well, you're going to look really f--ked up in these photos," The Rock said.

All in a day's work, right Beau?