Jonah Hill looks unrecognisable in new role as he returns to Hollywood

Jonah Hill will be back on our screens soon alongside Keanu Reeves, but fans didn't recognise him thanks to a brand-new look.

The Superbad and 21 Jump Street star has undergone a transformation of late.

Hill, 42, is keeping busy both in front of and behind the camera, as he has written, directed, and starred in a new Apple TV movie called Outcome, alongside John Wicks star Reeves. A still from the forthcoming film, which will also star the likes of Cameron Diaz and Matt Bomer, was shared on Instagram.

He's unrecognisable from his former self, both his early-days short curly brown hair and a clean-shaven face and his later dyed-blonde, slicked back locks. Hill has now braved the shave with a bald head, and he's sporting a beard too, as he's seen with one hand on Keanu's shoulder in the still.

Jonah is unrecognisable with his new look alongside Keanu Reeves (Apple TV)

The greying beard and smooth scalp has left fans surprised to realise it's the superstar comedian.

"Who's Hill?" wrote one confused fan.

"I'm guessing the bald guy!?" wrote another.

"Everyone looks 20 years younger!" added one viewer.

According to Apple TV, the forthcoming film tells the tale of a former child star 'Reef Hawk, Hollywood’s poster child since age six' who is 'not okay'.

“When he learns about an extortion plot tied to a mysterious video, Reef pre-emptively sets out on a redemption tour to make amends, confront his demons, and avoid getting cancelled."

Reeves has taken on the role of Reef Hawk in the project, which has been described as a black comedy. Reef goes on a soul-searching journey as he tries to uncover who has wronged and why they would want to blackmail him. Diaz and Bomer play his best friends, while Hill plays his crisis lawyer, Ira.

His latest onscreen look is a world away from his usual style (Taylor Hill / Contributor / via Getty)

Also in the cast is Martin Scorsese, Susan Lucci, David Spade, Roy Wood Jr., and Kaia Gerber.

Hill has described the project as 'a metaphor for what we all go through living on social media' while speaking at a press junket on Monday.

He added: “Social media has made us obsessed with what people we don’t know think of us, instead of caring about what the people who know us best think of us."

In recent press pics, it looks like Hill has grown his hair back, but the beard has stayed.

As for the other stars of the film, it'll be somewhat part of a return to our screens for Diaz, who previously took a decade away from acting until she returned with Back In Action for Netflix last year.

Outcome will be on Apple TV from April 10.