Elijah Wood in 'Hobbit' and 16 Other Cameos in Prequels, Reboots and Remakes

‘21 Jump Street’: Johnny Depp and Peter DeLuise

Depp reprised his role as Tom Hanson – now an undercover DEA agent – in the film’s most memorable scenes. Along with original Jump Street character Doug Penhall (Peter DeLuise), the two revealed themselves after having infiltrated a gang for five years. Depp seems more upset that he had to wear a fake nose and get a tattoo in a private area than that their cover was blown.

‘The Beverly Hillbillies’: Buddy Ebsen

The man known for playing Jed Clampett reprises the role of Barnaby Jones, a character he played for eight seasons on the show of the same name. When Granny (Cloris Leachman) goes missing, Jones puts his detective skills to work to help find her.

‘Casino Royale’: Judi Dench

Dame Dench’s role as M carried over from Pierce Brosnan James Bond films into the Daniel Craig era. Much more substantial than a mere cameo, Dench helped provide the connective tissue between the two very different eras of Bond films, and continued with the role through 2012’s Skyfall.

‘Charlie’s Angels: Full Throttle’: Jaclyn Smith

Original Angel Jaclyn Smith plays a real angel who gives advice to a down-and-out Dylan Sanders (Drew Barrymore). “Angels are like diamonds. You can’t make them. You have to find them.”

‘Dark Shadows’: Original Castmembers

Actors Lara Parker, Jonathan Frid, David Selby, and Kathryn Leigh Scott from the cult-classic gothic soap opera came as guests at a ball at Collinwood Manor. It was the last onscreen appearance for Frid, who played the vampire Barnabas Collins in the series, as he died weeks before the film’s May 2012 premiere.

‘Get Carter’: Michael Caine

Michael Caine played a London gangster investigating his brother’s death in the 1971 crime drama. In the 2000 remake starring Sylvester Stallone, Caine played a club owner who may not be reliable. While the original film has become a British classic, the remake stalled at the box office and received generally negative reviews.

‘Get Smart’: Bernie Kopell

Already having portrayed agent of KAOS Siegfried on the classic spy comedy, Bernie Kopell plays a driver who warns Steve Carell’s Maxwell Smart that he shouldn’t run out into the road. Kopell is immediately rear ended. (“Ironic,” remarks Smart.)

‘The Hobbit: An Unexpected Journey’: Elijah Wood

Elijah Wood’s Frodo wasn’t yet born during events in The Hobbit, but he and Ian Holm (Bilbo) were able to return to Middle Earth for small cameos. “It feels like a family reunion,” Wood said in 2011 days before the shoot.

‘The Hobbit: An Unexpected Journey’: Ian Holm

Ian Holm passed on the roll of Bilbo Baggins to fan favorite Martin Freeman.

‘The Incredible Hulk’: Lou Ferrigno

Before the Hulk was a CG creation, body building legend Lou Ferrigno had to make the green beast come to life the old-fashioned way – with real muscles.  The star of the CBS’ The Incredible Hulk TV show appeared in Marvel’s two big-screen adaptations: Hulk (2003) and The Incredible Hulk (2008). He played a security guard in both films. In addition, Ferrigno helped provide the voice for the Hulk in 2012’s The Avengers.

‘Star Trek: Generations’: William Shatner

William Shatner helped fulfill a Trekie fantasy when James T. Kirk teamed up with Jean-Luc Picard (Patrick Stewart) in the Next Generation crew's first big-screen mission. The film saw Kirk become trapped in an energy ribbon known as the Nexus, a phenomenon that allows those inside to live out their fantasy lives. Decades later, Picard becomes trapped in the Nexus and enlists Shatner’s help to escape and defeat the villain Soran (Malcolm McDowell) who is seeking to return to the Nexus — regardless of how many inhabited planets he destroys in the process.

‘Star Trek’: Leonard Nimoy

J.J. Abrams’ 2009 Trek reboot featured a double dose of Spock, with Leonard Nimoy reprising his role as the iconic Vulcan. Nimoy’s Spock travels back in time from the 24th century, and is greeted by his contemporary Nero (Eric Bana), who blames Spock for the destruction of his native Romulus. Zachary Quinto played the younger Spock in the film.

‘Starsky and Hutch’: David Soul and Paul Michael Glaser

After Starsky (Ben Stiller) wrecks his beloved car, he buys one of the same make and model from the the original duo, David Soul and Paul Michael Glaser.

‘The Longest Yard’: Burt Reynolds

Burt Reynolds went from playing an NFL player-turned-convict in the 1974 original to portraying Nate Scarborough, a has-been college football star who agrees to coach the team of prison inmates.

‘Wall Street : Money Never Sleeps’: Charlie Sheen

Bud Fox (Charlie Sheen) and Gordon Gekko (Michael Douglas) didn’t leave on the best of terms in 1987’s Wall Street, as Gekko’s former mentor helped put him away for insider trading. Decades later, it seems Fox has the last laugh (again) – as it’s revealed he’s retired and independently wealthy after rehabilitating an airline Gekko tried to gut for parts in the first film

‘X-Men: First Class’ Hugh Jackman

“Go f—k” yourselves," Wolverine says when Charles (James McAvoy) and Eric (Michael Fassbender) approach him about joining their team of mutants. Wolverine’s f-bomb so delighted that many were willing to forgive the continuity problems of Professor X meeting Logan in the 1960s.

'X-Men: First Class': Rebecca Romijn

Rebecca Romijn didn't have to endure hours in makeup to reprise her role as Mystique the X-Men prequel.