5 Hollywood celebs you didn't know appeared in WWE

For several decades, the WWE has worked closely with the world of celebrities, using famous names and faces to help promote shows, whilst giving these Hollywood stars exposure to a new potential audience.

Even going back to the first WrestleMania, the inaugural Showcase of the Immortals was chock-filled with celebs of the time, from Liberace to Muhammad Ali, to Mr. T, who competed in the main event.

And since then, the WWE has always looked to celebrities to join the company for a stint, often focussing primarily on actors, who are already well-taught on how to perform in stories, and therefore can transition well to WWE storylines.

Whilst stars like Dwayne 'The Rock' Johnson and John Cena have made an incredible leap from WWE to acting, there are plenty who have come from the movie set to wrestling

Here are five Hollywood celebrities you didn't know were in WWE.

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#5 Kelsey Grammer (WrestleMania 32)

Grammer as Dr. Frasier Crane, in his spin-off of the iconic sitcom Cheers.

One of the stars of Cheers, Kelsey Grammer got his big solo break in the show's spin-off, where he returned as the snooty Dr. Frasier Crane, with his dulcet tones and knowledge of elitist culture making for some hilarious episodes.

Fans may also recognize Grammer's voice for his work as Sideshow Bob in the Simpsons, the former sideshow act to Krusty the Clown, who now has a vendetta against the boy who sent him to prison, Bart.

Part of film franchises like X-Men, Transformers and even Toy Story, Grammer played a small role at WrestleMania 32.

Introducing the show, Grammer lent his iconic voice to WWE, and whilst fans may have mixed feelings on the show, no-one can deny that Grammer made the iconic show feel exactly that.

#4 Ben Stiller

Stiller appeared on Monday Night RAW in 1999 but was left reeling thanks to a figure-four leg lock.

With films like Zoolander, Tropic Thunder, and Dodgeball: A True Underdog story, Ben Stiller has been a massive success in his acting career.

Not just satisfied with cinema, the 53-year-old is also a huge star of TV, holding three Emmys for his 1990s, 'The Ben Stiller Show'.

But when the funnyman came to the WWF, he didn't get on the good side of Jeff Jarrett.

Appearing on a 1999 edition of RAW, Stiller ticked off Double-J during an interview, commenting on the 'assets', of Jarrett's manager Debra.

Irate, the future TNA founder took the Madagascar star down, punishing Stiller with a figure-four leg lock.

Fortunately for Stiller, D'Lo Brown was at hand to make the save, and Stiller returned to Hollywood, never to be seen in a WWE ring ever again.

#3 David Hasselhoff

The Hoff addresses the WWE Universe on Monday Night RAW in 2010.

David Hasselhoff is a true icon of the 80s, with the Hollywood star even holding the Guinness World Record for the most watched man in Television.

Getting his big break on 'The Young and the Restless', Hasselhoff would move on to shows such as Knight Rider, solving mysteries with his advanced car KITT, before joining the equally iconic Baywatch.

Appearing as the guest host of Monday Night RAW in London, England, 'The Hoff' was reunited with KITT, and made some huge matches.

One of which included the upcoming Extreme Rules 2010 pay per view, announcing then-World Heavyweight Champion Jack Swagger (whom Hoff referred to as Jackie Swagger) would defend against Randy Orton.

Swagger would go on to retain the title, no thanks to the Hoff, a superstar of his own right in film and TV.

#2 David Arquette

Arquette in the crowd of a WWE show.

A star of the Scream movies, most wrestling fans know of David Arquette for his brief stint in WCW, where he held the WCW World Championship.

But whilst some fans hoped this would be the last appearance of Arquette, he did make a shocking appearance on WWE RAW in 2010, playing up to the fans natural animosity, proclaiming himself one of the greatest champions of all time.

Befriending future-WWE A-Lister and then WWE Champion The Miz, Arquette would even team with Miz's protege Alex Riley, in a 2-on-1 handicap match against Randy Orton.

Sadly for Arquette, their two heads were not better than the Viper, who swiftly pummeled both men, before setting his sights on the champion.

In recent years, Arquette has returned to wrestling, and with the WWE Royal Rumble just weeks away, who knows if he may strike?

#1 Hugh Jackman

The Wolverine star floored Ziggler on RAW in 2011, before returning to the ring in 2014

Possibly the most recognizable name on this list, Hugh Jackman made his presence known when he appeared on RAW in 2011.

Being chastised by then-United States Champion Dolph Ziggler, Jackman watched in the corner of Zack Ryder, when Ryder took on the Show-Off.

With the referee's back turned, the X-Men star struck, punching Jackman square in the jaw, to give the Woo Woo Woo Warrior the victory.

It seemed all was forgiven three years later though, when Jackman returned to RAW, siding with Ziggler, before being interrupted by 'Magneto', who was actually Damien Sandow.

Showing his acting chops, Jackman feigned that Sandow did indeed was a 'master of magnetism', miming a struggle with the metal microphone, before flooring the Intellectual Savior of the Masses with another devastating hook, before celebrating with the Show-Off.