Derek Hough joins zombie sneak attack at Knott's Scary Farm

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Watch Derek Hough Surprise (and Scare!) Fans for Halloween


Derek Hough got his scare on a little early this Halloween at Knott's Scary Farm, and we have the video!

"What's up Entertainment Tonight!" Derek says in our clip. "We're at Knott's Scary Farm. Come play with us!"

WATCH: Bindi Irwin and Derek Hough Pull Off Epic Lift During Flawless 'Dirty Dancing' Routine on 'DWTS'

The "Dancing With the Stars" pro was one of thousands of monsters roaming the theme park for its annual Halloween haunt, but before being let loose on the unsuspecting crowd, he spent a bunch of time in the makeup chair.

PHOTOS: Derek Hough through the years

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Derek Hough joins zombie sneak attack at Knott's Scary Farm
BUENA PARK, CA - OCTOBER 01: Derek Hough arrives at the Knott's Scary Farm Black Carpet at Knott's Berry Farm on October 1, 2015 in Buena Park, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - SEPTEMBER 20: Actor Derek Hough arrives at the 67th Annual Primetime Emmy Awards at the Microsoft Theater on September 20, 2015 in Los Angeles, California. (Photo by Dan MacMedan/WireImage)
Dancer / TV Personality Derek Hough attends the 5th Annual American Humane Association Hero Dog Awards at The Beverly Hilton Hotel on September 19, 2015 in Beverly Hills, California.
LOS ANGELES, CA - SEPTEMBER 12: Derek Hough poses in the press room during the 2015 Creative Arts Emmy Awards at Microsoft Theater on September 12, 2015 in Los Angeles, California. (Photo by C Flanigan/FilmMagic)
LOS ANGELES, CA - AUGUST 07: Dancer Derek Hough perform MOVE Live On Tour at Microsoft Theater on August 7, 2015 in Los Angeles, California. (Photo by Earl Gibson III/WireImage)
NEW YORK, NY - JULY 13: Derek Hough performs onstage during the Lip Sync Battle LIVE At SummerStage In New York on July 13, 2015 in New York City. (Photo by Theo Wargo/Getty Images for SpikeTV)
NEW YORK, NY - JULY 09: Derek Hough is seen walking in soho n July 9, 2015 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - MARCH 26: Actor Derek Hough attends the 2015 New York Spring Spectacular Opening Night at Radio City Music Hall on March 26, 2015 in New York City. (Photo by Andrew H. Walker/WireImage)
NEW YORK, NY - MARCH 02: Derek Hough speaks at AOL Studios In New York on March 2, 2015 in New York City. (Photo by John Lamparski/WireImage)
NEW YORK, NY - FEBRUARY 18: Derek Hough attends Radio City Spring Spectacular Photo Call at Radio City Music Hall on February 18, 2015 in New York City. (Photo by Steve Mack/FilmMagic)
NEW YORK, NY - MARCH 02: (EXCLUSIVE COVERAGE) Dancer Derek Hough visits the SiriusXM Studios on March 2, 2015 in New York City. (Photo by Cindy Ord/Getty Images)
NEW YORK, NY - FEBRUARY 11: Professional Dancer Derek Hough attends Nylon and Fashion Police's 'Fifty Shades Of Grey' Release Party at Dream Downtown on February 11, 2015 in New York City. (Photo by Mike Pont/Getty Images)
UNIVERSAL CITY, CA - NOVEMBER 06: Derek Hough visits 'Extra' at Universal Studios Hollywood on November 6, 2014 in Universal City, California. (Photo by Noel Vasquez/Getty Images)
LOS ANGELES, CA - AUGUST 25: E! LIVE FROM THE RED CARPET -- Pictured: TV personality Derek Hough visits E! 'Live From The Red Carpet' at the 66th Annual Primetime Emmy Awards held at the Nokia Theater on August 25, 2014. (Photo by Imeh Akpanudosen/NBC/NBC via Getty Images)
LOS ANGELES, CA - AUGUST 11: Derek Hough attends a signing for his book 'Taking The Lead: Lessons From A Life in Motion' at Barnes and Noble at The Grove on August 11, 2014 in Los Angeles, California. (Photo by Tibrina Hobson/FilmMagic)
LOS ANGELES, CA - JULY 27: TV personality Derek Hough attends the 2014 Young Hollywood Awards brought to you by Samsung Galaxy at The Wiltern on July 27, 2014 in Los Angeles, California. (Photo by Stefanie Keenan/Getty Images for Variety)
LOS ANGELES, CA - APRIL 25: TV personality / dancer Derek Hough is seen directing on the set of the video shoot for Mark Ballas' debut single 'Get My Name' on April 25, 2014 in Los Angeles, California. (Photo by Chelsea Lauren/WireImage)
LOS ANGELES, CA - APRIL 25: TV personality / dancer Derek Hough is seen directing on the set of the video shoot for Mark Ballas' debut single 'Get My Name' on April 25, 2014 in Los Angeles, California. (Photo by Chelsea Lauren/WireImage)
LOS ANGELES, CA - MARCH 31: Actor Derek Hough attends a screening of 'Make Your Move' at Pacific Theatre at The Grove on March 31, 2014 in Los Angeles, California. (Photo by David Livingston/Getty Images)
HOLLYWOOD, CA - NOVEMBER 21: Dancer/TV personality Derek Hough attends the Xbox One LA Launch Party at Milk Studios on November 21, 2013 in Hollywood, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - SEPTEMBER 22: TV Personality / Choreographer Derek Hough poses in the press room at the 65th annual Primetime Emmy Awards at Nokia Theatre L.A. Live on September 22, 2013 in Los Angeles, California. (Photo by Paul Archuleta/FilmMagic)
LOS ANGELES, CA - MARCH 14: Derek Hough is seen on March 14, 2012 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
BEVERLY HILLS, CA - OCTOBER 28: Dancer Derek Hough attends the Big Brothers Big Sisters of greater Los Angeles 2011 Rising Stars gala at The Beverly Hilton hotel on October 28, 2011 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES - SEPTEMBER 29: Derek Hough leaves the 'Dancing With the Stars' studio on September 29, 2010 in Los Angeles, California. (J. Michael Arnoldi/BuzzFoto/FilmMagic)
LOS ANGELES, CA - AUGUST 21: Dancer Derek Hough arrives at 62nd Primetime Creative Arts Emmy Awards at the Nokia Theatre L.A. Live on August 21, 2010 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - APRIL 24: Derek Hough is seen on April 24, 2010 in Los Angeles, California. (Photo by Jean Baptiste Lacroix/WireImage)
DANCING WITH THE STARS - In week two of 'Dancing with the Stars,' all of the couples return to dance their second routines in a two-hour show, MONDAY, MARCH 29 (8:00-10:00 p.m., ET), on the ABC Television Network. (Photo by Chris Chavira/ABC via Getty Images) DEREK HOUGH
TV personality Derek Hough arrives at the Los Angeles Premiere 'The Wolfman' at the ArcLight Cinemas on February 9, 2010 in Hollywood, California. (Photo by Jon Kopaloff/FilmMagic)
WEST HOLLYWOOD, CA - OCTOBER 31: Dancer Derek Hough arrives at Heidi Klum�s 10th Annual Halloween Party Presented by MSN and SKYY Vodka held at the Voyeur on October 31, 2009 in West Hollywood, California. (Photo by Alexandra Wyman/WireImage)
Dancer Derek Hough arrives at Family Guy's Pre-Emmy Celebration at Avalon on September 18, 2009 in Hollywood, California. (Photo by Stefanie Keenan/WireImage)
LOS ANGELES, CA - SEPTEMBER 20: Dancer Derek Hough arrives at the 13th Annual Entertainment Tonight and People Magazine Emmys After Party at the Vibiana on September 20, 2009 in Los Angeles, California. (Photo by Lester Cohen/WireImage)
LOS ANGELES, CA - SEPTEMBER 12: Television personality Derek Hough attends the 2009 Creative Arts Emmy Awards at Nokia Theatre LA Live on September 12, 2009 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
Dancer Derek Hough poses with Tivo TV Man at Melanie Segal's Teen Choice Lounge Presented by Rocket Dog at The Magic Castle on August 6, 2009 in Hollywood, California. (Photo by Tiffany Rose/WireImage)
INDIANAPOLIS - MAY 24: Mark Ballas and Derek Hough of The Ballas-Hough band perform onstage inside the Indy 500 race after party at The Conrad Hotel on May 24, 2009 in Indianapolis, Indiana. (Photo by Joey Foley/Getty Images)
Derek Hough attends the 16th Annual Entertainment Industry Foundation's Revlon Run/Walk for Women on May 9, 2008 in Los Angeles, California. (Photo by Chris Weeks/WireImage)
LOS ANGELES, CA - OCTOBER 30: Derek Hough attends Kim Kardashian and PAMA's Halloween Masquerade at the Stone Rose on October 30, 2008 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)
HOLLYWOOD - OCTOBER 18: *** EXCLUSIVE ACCESS **** Derek Hough attends the 4th Annual 'inCONCERT' Benefit to raise money for Project Angel Food on October 18, 2008 at the Howard Fine Theater in Hollywood, California. (Photo by John M. Heller/Getty Images)
LOS ANGELES, CA - NOVEMBER 18: Dancer Derek Hough arrives at the 2007 American Music Awards held at the Nokia Theatre L.A. LIVE on November 18, 2007 in Los Angeles, California. (Photo by David Livingston/Getty Images)
Derek Hough attends the opening night of Disney's High School Musical: The Ice Tour at the Staples Center in Los Angeles, California on October 5, 2007. (Photo by Jason LaVeris/FilmMagic)
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Derek was unrecognizable as he jumped out from closed doors to terrify guests, but the biggest screams came when he removed his mask, revealing his true identity.

"My grandma is going to be so jealous!" one guest yelled.

WATCH: 'DWTS' Stars Bindi Irwin and Derek Hough Recreate Iconic 'Dirty Dancing' Scene

Derek is still riding a high from his perfect score on Monday's "DWTS" for his rumba with celeb partner Bindi Irwin.

Watch the dynamic duo return to the ballroom Mondays on ABC.

Bindi Irwin and Derek Hough Recreate 'Dirty Dancing'!
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