On Monday night, the stars of "End of Watch" hit the red carpet to celebrate the premiere of their film.

After a routine traffic stop, a police team (Jake Gyllenhaal and Michael Pena) is marked for death by a Mexican cartel. From David Ayers, the film uses gritty found-footage and security cameras to give you an up-close-and-personal view of the real life dangers on the force.

Gyllenhaal spoke with Moviefone at this year's Toronto Film Festival about what it took to prepare for his new action film.

"We went on ride-alongs for five months, two to three times a week with the LAPD and sheriff's department and Inglewood PD. We would work with them from about 4:00 p.m. to about four or five in the morning. Then we did tactical training about two or three times a week with live ammunition and training exercises, then fight training almost every morning with [director] Dave Ayers's best friend, who has a dojo, getting the crap beat out of us by 14 to 20-year-old kids. That coupled with rehearsing on our time off and just spending time with [co-star] Mike [Pena] out of work and getting to know each other."

The stars of the film -- Gyllenhaal, Anna Kendrick, Michael Pena and America Ferrera -- were all in attendance at last night's event. Take a look at the red carpet pics below.

"End of Watch" hits theaters September 21.

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  • Jake Gyllenhaal

    Jake Gyllenhaal attends the LA premiere of "End of Watch" at Regal Cinemas L.A. Live on Monday, Sept. 17, 2012, in Los Angeles. (Photo by Todd Williamson/Invision/AP)

  • Joe Manganiello

    Joe Manganiello attends the LA premiere of "End of Watch" at Regal Cinemas L.A. Live on Monday, Sept. 17, 2012, in Los Angeles. (Photo by Todd Williamson/Invision/AP)

  • Arnold Schwarzenegger

    Arnold Schwarzenegger attends the LA premiere of "End of Watch" at Regal Cinemas L.A. Live on Monday, Sept. 17, 2012, in Los Angeles. (Photo by Todd Williamson/Invision/AP)

  • Jake Gyllenhaal, Michael Pena

    Jake Gyllenhaal and Michael Pena attend the LA premiere of "End of Watch" at Regal Cinemas L.A. Live on Monday, Sept. 17, 2012, in Los Angeles. (Photo by Todd Williamson/Invision/AP)

  • America Ferrera

    America Ferrera attends the LA premiere of "End of Watch" at Regal Cinemas L.A. Live on Monday, Sept. 17, 2012, in Los Angeles. (Photo by Todd Williamson/Invision/AP)

  • Jake Gyllenhaal, Michael Pena

    Jake Gyllenhaal and Michael Pena attend the LA premiere of "End of Watch" at Regal Cinemas L.A. Live on Monday, Sept. 17, 2012, in Los Angeles. (Photo by Todd Williamson/Invision/AP)

  • Premiere Of Open Road Films' "End Of Watch" - Arrivals

    LOS ANGELES, CA - SEPTEMBER 17: Actress Karina Smirnoff arrives at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - Arrivals

    LOS ANGELES, CA - SEPTEMBER 17: Actress Karina Smirnoff arrives at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - Red Carpet

    LOS ANGELES, CA - SEPTEMBER 17: Actor Jake Gyllenhaal, President of Marketing at Open Road Films Jason Cassidy and Open Road Films Senior VP of Acquisitions Ben Cotner arrive at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - Arrivals

    LOS ANGELES, CA - SEPTEMBER 17: Producers Matt Jackson, Nigel Sinclair and John Lesher arrive at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - After Party

    LOS ANGELES, CA - SEPTEMBER 17: Actor Michael Pena (L) and actress Jennie Garth pose at the after party for the premiere of Open Road Films' 'End of Watch' at WP24 on September 17, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - After Party

    LOS ANGELES, CA - SEPTEMBER 17: Actors Joe Manganiello (L) and Anna Kendrick pose at the after party for the premiere of Open Road Films' 'End of Watch' at WP24 on September 17, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - After Party

    LOS ANGELES, CA - SEPTEMBER 17: Actors America Ferrera (L) and Natalie Martinez pose at the after party for the premiere of Open Road Films' 'End of Watch' at WP24 on September 17, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - Arrivals

    LOS ANGELES, CA - SEPTEMBER 17: Actress Natalie Martinez arrives at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - Arrivals

    LOS ANGELES, CA - SEPTEMBER 17: Actress Cody Horn arrives at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - Arrivals

    LOS ANGELES, CA - SEPTEMBER 17: Actress Cody Horn arrives at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Premiere Of Open Road Films' "End Of Watch" - Arrivals

    LOS ANGELES, CA - SEPTEMBER 17: Olympic swimmer Tyler Clary arrives at the premiere of Open Road Films' 'End of Watch' at Regal Cinemas L.A. Live on September 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)