Jimmy Kimmel Pranks Matt Damon By Dispatching Guillermo To His Press Junket (VIDEO)

Jimmy Kimmel Ramps Up War On Matt Damon
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Jimmy Kimmel's arch-nemesis Matt Damon is promoting a new movie, which means only one thing: Jimmy's going to try to screw it up somehow. Did you really think he wouldn't? After Damon slept with his girlfriend and stole his show?

The talk show host dispatched his security guard/sidekick Guillermo to crash Damon's press junket for Elysium to promote his own movie. Check out the clip above to see Matt lose his cool.

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Before You Go

Jimmy Kimmel Through The Years
Jimmy Kimmel As Jay Leno(01 of22)
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In this publicity image released by ABC, Jimmy Kimmel is dressed as late night host Jay Leno during "Jimmy Kimmel Live" on Tuesday, Jan. 12, 2010 in Los Angeles. (AP Photo/ABC, Mitch Haddad) (credit:AP)
Jimmy Kimmel 2003(02 of22)
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"Jimmy Kimmel Live" started in January, 2003. (credit:<a href="http://www.ew.com/ew/article/0,,417718,00.html" role="link" class=" js-entry-link cet-external-link" data-vars-item-name="Entertainment Weekly" data-vars-item-type="text" data-vars-unit-name="5bad26c3e4b04234e85745a1" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.ew.com/ew/article/0,,417718,00.html" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="0" data-vars-position-in-unit="2">Entertainment Weekly</a>)
Jimmy Kimmel And Uncle Frank(03 of22)
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In this Dec. 16, 2010 photo released by ABC, late night talk show host Jimmy Kimmel, right, talks with his Uncle Frank Potenza on the set of "Jimmy Kimmel Live" in the Hollywood section of Los Angeles. Potenza, who handled both security and comedy on ABCs Jimmy Kimmel Live!, died Tuesday, Aug. 23, 2011 at the age of 77. (AP Photo/ABC, Adam Larkey) (credit:AP)
Jimmy Kimmel At 'Funny People' Premiere(04 of22)
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HOLLYWOOD - JULY 20: Comedian Jimmy Kimmel attends the premiere of Universal Pictures' 'Funny People' held at ArcLight Cinemas Cinerama Dome on July 20, 2009 in Hollywood, California. (Photo by Kevin Winter/Getty Images) (credit:Getty Images)
Jimmy Kimmel With Jon Stewart And Stephen Colbert(05 of22)
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This image released by Disney ABC Television Group shows host Jimmy Kimmel, right, with guests, Stephen Colbert, from "The Colbert Report," left, and Jon Stewart from "The Daily Show with Jon Stewart," during the "Jimmy Kimmell Live" show, Thursday, Nov. 1, 2012 in New York. (AP Photo/Disney ABC Television Group, Jeff Neira) (credit:AP)
Jimmy Kimmell(06 of22)
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CHICAGO - JULY 13: Jimmy Kimmell hits the ball during the All Star Legends and Celebrity Softball Game on July 13, 2003 at U.S. Cellular Field in Chicago, Illinois. (Photo by Jonathan Daniel/Getty Images) (credit:Getty Images)
Firestone, Kimmell joke(07 of22)
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CHICAGO - JULY 13: Andrew Firestone and Jimmy Kimmell joke before the All-Star Legends and Celebrity Softball Game on July 13, 2003 at U.S. Cellular Field in Chicago, Illinois. (Photo by Jonathan Daniel/Getty Images) (credit:Getty Images)
Jimmy Kimmel And David Letterman(08 of22)
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In this Oct. 31, 2012 photo released by ABC, host Jimmy Kimmel, right, speaks with guest David Letterman during "Jimmy Kimmel Live," in the Brooklyn borough of New York. New York's late-night TV hosts were back in swing, though, with all resuming regular production Wednesday. Kimmel, who usually broadcasts from Los Angeles, is doing a week of shows in Brooklyn. (AP Photo/ABC, Jeff Neira) (credit:AP)
Jimmy Kimmel During The Blackout(09 of22)
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In a photo provided by "Jimmy Kimmel Live," Dierks Bentley, center with guitar, and his band are recorded on a laptop computer on the desk in front of Jimmy Kimmel, right, at the taping of the "Jimmy Kimmel Live" show Tuesday night June 22, 2010 in Los Angeles. The show was recorded on a laptop after a power outage shut down the control room, broadcast transmission center, and tape operations area. (AP Photo/Fred Greissing) (credit:AP)
Jimmy Kimmel(10 of22)
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FILE - This Nov. 12, 2012 file photo shows Jimmy Kimmel at the TV Guide Magazine's 2012 Hot List Party at Skybar at the Mondrian Hotel in West Hollywood, Calif. Kimmel went head-to-head Tuesday, Jan. 8, 2013, for the first time against CBS Late Show with David Letterman and NBCs Tonight Show with Jay Leno. According to Nielsen fast national ratings, Kimmel edged out Letterman and ran slightly behind Leno in total viewers. (Photo by Todd Williamson/Invision/AP, file) (credit:AP)
Jimmy Kimmel On The Red Carpet(11 of22)
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Jimmy Kimmel And His Son Kevin(12 of22)
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SANTA MONICA, CA - FEBRUARY 24: Television talk show host Jimmy Kimmel (L) and son Kevin Kimmel arrive at the 22nd Annual Film Independent Spirit Awards held at Santa Monica Beach on February 24, 2007 in Santa Monica, California. (Photo by Frederick M. Brown/Getty Images) (credit:Getty Images)
Jimmy Kimmel And Manny Pacquiao(13 of22)
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This iimage provided by ABC, shows boxing champion Manny Pacquiao, left, joking with talk show host, Jimmy Kimmel Nov. 3, 2011 on the set of Jimmy Kimmel Live in Los Angeles. Pacquiao has made five appearances on Jimmy Kimmel Live, promoting his pay-per-view bouts. (AP Photo/ABC, Carin Baer) (credit:AP)
Jimmy Kimmel With 'Twilight' Cast & Creator(14 of22)
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HOLLYWOOD, CA - NOVEMBER 03: (L-R) Actors Robert Pattinson, Kristen Stewart, writer Stephenie Meyer, actor Taylor Lautner and TV personality Jimmy Kimmel attend Hand and Footprint Ceremony at the Grauman's Chinese Theatre on November 3, 2011 in Hollywood, California. (Photo by Kevin Winter/Getty Images) (credit:Getty Images)
Jimmy Kimmel And Bob Barker(15 of22)
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BEVERLY HILLS, CA - FEBRUARY 7: Television game show host Bob Barker and emcee Jimmy Kimmel pick raffle winners at the 44th Annual ICG Publicists Awards Luncheon on February 7, 2007 at the Beverly Hilton Hotel in Beverly Hills, California. (Photo by Vince Bucci/Getty Images) (credit:Getty Images)
Jimmy Kimmel At The 60th Primetime Emmy Awards(16 of22)
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LOS ANGELES, CA - SEPTEMBER 21: Talk show host Jimmy Kimmel speaks onstage during the 60th Primetime Emmy Awards held at Nokia Theatre on September 21, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images) (credit:Getty Images)
Jay-Z Performs On 'Jimmy Kimmel Live!' On Hollywood Boulevard(17 of22)
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HOLLYWOOD - NOVEMBER 22: Jay-Z and Jimmy Kimmel appear onstage during a taping of Jimmy Kimmel Live outside of the El Capitan Theatre on Hollywood Boulevard on November 22, 2006 in Hollywood, California. Jay-Z is appearing on the late night show to support his return to music and new album, 'Kingdom Come.' (Photo by Karl Walter/Getty Images) (credit:Getty Images)
HRTS Newsmaker Luncheon Presents "The Hitmakers"(18 of22)
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BEVERLY HILLS, CA - NOVEMBER 29: (L-R) Executive producer Ali LeRoi and TV host and moderator Jimmy Kimmel speak at the HRTS Newsmaker Luncheon Presents 'The Hitmakers' at the Regent Beverly Wilshire on November 29, 2005 in Beverly Hills, California. (Photo by Stephen Shugerman/Getty Images for HRTS) (credit:Getty Images)
ABC 2004 Winter Press Tour(19 of22)
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HOLLYWOOD, CA - JANUARY 15: (L to R) Television host Jimmy Kimmel of the 'Jimmy Kimmel Live' television show and producer Duncan Gray attend the ABC 2004 Winter Press Tour at the Hollywood Renaissance Hotel on January 15, 2004 in Hollywood, California. (Photo by Frederick M. Brown/Getty Images). (credit:Getty Images)
ABC Network All-Star Party(20 of22)
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NEW YORK - MAY 18: TV Host Jimmy Kimmel (C) Actresses Faith Ford (L) and Kelly Ripa (R) attend the ABC Network All-Star Party on May 18, 2004 in New York City. (Photo by Peter Kramer/Getty Images) (credit:Getty Images)
ABC All-Star Party(21 of22)
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HOLLYWOOD, CA - JANUARY 15: Actor Jimmy Kimmel attends 'The ABC All-Star Party' to celebrate the networks mid-season television shows at Quixote Studios on January 15, 2003 in Hollywood, California. (Photo by Jon Kopaloff/Getty Images) (credit:Getty Images)
Jimmy Kimmel(22 of22)
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LOS ANGELES - NOVEMBER 12: Host Jimmy Kimmel moderating the Hollywood Radio and Television Society 'The Hitmakers Luncheon' a gathering of some of the hottest creators and producers in television today November 12, 2003 in Los Angeles, California. (Photo by Carlo Allegri/Getty Images) (credit:Getty Images)