Celebrity Big Brother's Micky Rourke unrecognisable with new hair before launch

looked unrecognisable when he posed for a snap, rocking his new hair on Sunday before heading into the Celebrity house. The American actor, 72, has signed up for the reality show, which boasts stars including Patsy Kensit, JoJo Siwa and Chesney Hawkes.

Mickey was reportedly the final housemate to sign up for the show and celebrated his final night of freedom by enjoying a slap-up meal in London with some pals. Posing for the snap in which he sports chin-length mahogany-hued hair, the former boxer looked a away from his days as an 80s film star in which his natural brown locks were closely cropped.

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Posing for the photo with his pals in the capital, Mickey held up his fist as he smiled for the camera, sporting a grey silk blazer, burgundy scarf, jeans and a selection of silver chains.

Captioning the photo, which was shared on Instagram, he wrote: "In London at the moment with Liam kid Vaughan and his brother Ryan Vaughan. LIVERPOOL strong."

The actor - who has an estimated net worth of £3.8million ($5million) - is reportedly being paid a huge six-figure sum to appear on the ITV show alongside the likes of star, Jack P Shepherd and RuPaul's Drag Race's Danny Bear.

However, there are fears that the former Hollywood heartthrob could decide to leave the Big Brother house early, which has been described as a 'worse-case scenario' for show bosses.

"The last time he was really big was during The Wrestler, and he like everyone else needs to pay some bills," a source told .

"So doing the show is a no brainer. He's a producers dream because he has loads of stories, is a loose cannon, he is considered a huge get.

"Producers always hope for the train-wreck but being a revelation works as well, if we see a new side of Mickey that could work.

"The worst-case scenario would be if he left early. When he did The Masked Singer a few years ago, he eliminated himself."

Mickey will reportedly appear on Big Brother alongside Love Island's , Olympian Daley Thompson, and politician Sir - who also boasts an unusual barnet.

The star has enjoyed decades in the spotlight since making his acting debut in the film 1941, which was released in 1979. He had a supporting role in Body Heat (1981) before starring as a lead in several films released in the 1980s like Year of the Dragon (1985), 9½ Weeks (1986) and Francesco (1989).

He's also been in films including the Rainmaker (1997), Buffalo '66 (1998) and Sin City (2005).

The actor received particular acclaim for his role in the Wrestler (2008) and was nominated for an Academy Award in the Actor in a Leading Role category for his performance as Robin Ramzinski.

Although he didn't win that award, Mickey has a whole host of gongs, including a for the film, which also stars Tom Hardy.

Celebrity Big Brother starts tonight at 9pm on ITV

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