ABC-TV anchor Roger Grimsby as himself in BANANAS (1971). © United Artists

Marshall McLuhan as himself, correcting misinterpretations of his work by a loud man in line for a movie in ANNIE HALL (1977). McLuhan was a Canadian educator, philosopher, and scholar, a professor of English literature, a literary critic, a rhetorician, and a communication theorist. McLuhan is known for coining the expressions "the medium is the message" and "the global village" and predicted the World Wide Web almost thirty years before it was invented. © United Artists

Film critic Rex Reed plays himself in SUPERMAN: THE MOVIE (1978), briefly bumping into Lois Lane and Clark Kent outside the Daily Planet. © Warner Bros.

Milton Berle and his entourage unknowingly assists Pee Wee Herman sneaking into the movie studio lot in PEE WEES BIG ADVENTURE (1985). © Warner Bros.

Dr. Joyce Brothers as the 7th and last commentator announced at the Angels/Mariners game in THE NAKED GUN: FROM THE FILES OF POLICE SQUAD (1988). © Paramount Picture

Abbie Hoffman in Oliver Stone's anti-Vietnam War movie, BORN ON THE FORTH OF JULY (1989). He essentially played himself in the movie, waving a flag on the ramparts of an administration building during a campus protest that was being teargassed and crushed by state troopers. The film was released on December 20, 1989, more than eight months after Hoffman's suicide on April 12, 1989. © Universal Pictures

Shirley MacLaine has a cameo appearance as herself in DEFENDING YOUR LIFE (1991), acting as the holographic host of the "Past Lives Pavilion" (a reference to her publicly known belief in reincarnation). © Warner Bros.

Jayne Meadows in the crazy Queen of Hearts dress and Steve Allen as themselves in CASINO (1995). © Universal Pictures

"The Price is Right" host Bob Barker as Himself, Happy's celebrity golf partner at the Pro-AM in HAPPY GILMORE (1996). Bob and Happy get into an argument after an unruly fan harrassed Happy during the Pro-AM. Bob and Happy threw punches and Bob was winning the fight. After Happy headshots Bob, Happy states: "The Price is Wrong, bitch". After Happy states that, Bob chokes Happy, wakes up and continue punching him. After Happy tries to get up, Bob kicks Happy in the head and state: "I think you had enough, bitch". © Universal Pictures

Winona Ryder as herself, briefly reuniting with her REALITY BITES co-star Ben Stiller in ZOOLANDER (2001). © Paramount Pictures

Billy Zane as himself coming to Derek Zoolander's aid in his confrontation with Hansel McDonald (Owen Wilson) in ZOOLANDER (2001). © Paramount Pictures

Gary Shandling pops up in the crowd at the fashion show in ZOOLANDER (2001). © Paramount Pictures

Martha Stewart's very brief cameo as herself in MEN IN BLACK II (2002). © Columbia Pictures

Chuck Norris appears as himself as the deciding judge in DODGEBALL: A TRUE UNDERDOG STORY (2004). © 20th Century Fox

David Hasselhoff, acting as coach of the German Blitzkriegs in DODGEBALL: A TRUE UNDERDOG STORY (2004). This once again proves my theory, "German's love David Hasselhoff." © 20th Century Fox

Janeane Garofalo as herself in THEN SHE FOUND ME (2007). © ThinkFilm © Chelsea Films

Tim Robbins as himself in THEN SHE FOUND ME (2007). © ThinkFilm © Chelsea Films

Edie Falco as herself in THEN SHE FOUND ME (2007). © ThinkFilm © Chelsea Films

A few cameo's appear in the audience at the Oscar ceremonies at the end of TROPIC THUNDER (2008). In this shot is Jason Bateman and Jon Voight. © DreamWorks Pictures

Jennifer Love Hewitt's brief time onscreen as Kevin Sandusky (Jay Baruchel ) date at the Oscar ceremonies in TROPIC THUNDER (2008). © DreamWorkd Pictures

Alicia Silverstone as Jack Black's Oscar date in TROPIC THUNDER (2008). © DreamWorks Pictures

CNBC journalist Maria Bartiromo interviewing Gordon Gekko (Michael Douglas) in WALL STREET: MONEY NEVER SLEEPS (2010). © 20th Century Fox

Jim Cramer makes a brief appearance as himself in WALL STREET: MONEY NEVER SLEEPS (2010). © 20th Century Fox

Vanity Fair editor Graydon Carter is a bit surprised to run into Gordon Gekko in a restaurant in WALL STREET: MONEY NEVER SLEEPS (2010). © 20th Century Fox

Nouriel Roubini, co-founder of Roubini Global Economics in WALL STREET: MONEY NEVER SLEEPS (2010). © 20th Century Fox

THE IDES OF MARCH (2011) is an American political drama film directed by George Clooney, who also played Mike Morris, Governor of Pennsylvania and a Democratic presidential candidate. Charlie Rose as himself interviewing the candidate. © Columbia Pictures

Chris Matthews as himself in the political drama THE IDES OF MARCH (2011) © Columbia Pictures

A few actors as "themselves" manning the phones trying to raise money for The Muppets telethon in THE MUPPETS (2011). In the front row (L-R): unknown Muppet, John Krasinski, Neil Patrick Harris & Whoopi Goldberg. In the second row (L-R) Judd Hirsch, James Carville, unknown Muppet & Selena Gomez. In the back row are two unknown Muppets & Rico Rodriguez. © Walt Disney Studios Motion Pictures

Larry King interviewing President Prime Minister Admiral General Haffaz Aladeen in the extended version of THE DICTATOR (2012) © Paramount Pictures

Megan Fox as herself as President Prime Minister Admiral General Haffaz Aladeen latest Hollywood conquest in THE DICTATOR (2012). The President marks the occasion with a Polaroid and adds it to his trophy wall of hundreds of pics, including a hysterical one with Arnold Schwarzenegger. © Paramount Pictures

Ed Norton as himself in THE DICTATOR (2012) leaving the Men's restroom after giving favors to the Chinese P.M. © Paramount Pictures

CNN's Wolf Blitzer, one of many newscasters as themselves in the Will Ferrell/Zack Galifianakis comedy THE CAMPAIGN (2012). © Warner Bros.

MSNBC's Chris Matthews, one of many newscasters reporting the baby punching incident in the Will Ferrell/Zack Galifianakis comedy THE CAMPAIGN (2012). © Warner Bros.

Bill Maher as himself in the Will Ferrell/Zack Galifianakis comedy THE CAMPAIGN (2012). © Warner Bros.

THE ED SHOW's Ed Shutlz as himself in THE CAMPAIGN (2012). © Warner Bros.

MSNBC's Lawrence O'Donnell as himself in THE CAMPAIGN (2012). © Warner Bros.

Dennis Miller as himself in THE CAMPAIGN (2012) © Warner Bros.

Everyone' favorite CNN punching bag Piers Morgan as himself in THE CAMPAIGN (2012) © Warner Bros.

MSNBC's Willie Geist as himself in THE CAMPAIGN (2012). © Warner Bros.

Mika Brzezinski and Joe Scarborough as themselves in THE CAMPAIGN (2012). © Warner Bros.

Sam J. Jones as himself, hilariously reprising his role as FLASH GORDON in the film TED (2012). © Universal Pictures

A running joke where everyone seems to know him Tom Skerritt, he finally appears at the end of the film TED (2012) as ransom for release of his kidnapped daughter. © Universal Pictures

Ted Danson in a NSFW commentary on a fake CHEERS DVD in TED (2012). © Universal Pictures

Bill Maher in delivers a "New Rule" in IRON MAN 3. © Walt Disney Studios Motion Pictures

Reporting on Stark Industries in IRON MAN 3 is CNBC Financial Analyst Jim Cramer © Walt Disney Studios Motion Pictures

Joan Rivers is upset about something in IRON MAN 3 (2013). © Walt Disney Studios Motion Pictures

In FLIGHT (2012), CNN's Piers Morgan can be spotted reporting on the recent plane crash on CNN. © Paramount Pictures

Sent into semi-retirement somewhere on a remote tropical island, James Bond finds an English-speaking Wolf Blitzer on CNN in SKYFALL (2012). © Metro-Goldwyn-Mayer © Columbia Pictures