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Photo: Alexander Tamargo / WireImage Image 1 of / 13 Caption Close Image 2 of 13 Soundgarden in 1989. Soundgarden in 1989. Photo: Ebet Roberts / Redferns Image 3 of 13 Producer/singer Pharrell Williams performs at the Nickelodeon Kids' Choice Sports Awards 2014 at UCLA's Pauley Pavilion on July 17, 2014, in Los Angeles, California. Producer/singer Pharrell Williams performs at the Nickelodeon Kids' Choice Sports Awards 2014 at UCLA's Pauley Pavilion on July 17, 2014, in Los Angeles, California. Photo: Mark Davis / Getty Images Image 4 of 13 Ariana Grande attends MTV's "Total Ariana Live" at MTV Studios on July 2, 2014, in New York City. Ariana Grande attends MTV's "Total Ariana Live" at MTV Studios on July 2, 2014, in New York City. Photo: Jamie McCarthy / Getty Images for MTV Image 5 of 13 Image 6 of 13 (L-R) Musicians Chris Cornell, Matt Cameron, Kim Thayil and Ben Shepherd of Soundgarden arrive at the premiere of Marvel Studios' "The Avengers" at the El Capitan Theatre on April 11, 2012. in Hollywood, California. less (L-R) Musicians Chris Cornell, Matt Cameron, Kim Thayil and Ben Shepherd of Soundgarden arrive at the premiere of Marvel Studios' "The Avengers" at the El Capitan Theatre on April 11, 2012. in Hollywood, ... more Photo: Kevin Winter / Getty Images Image 7 of 13 Pharrell Williams performs on stage at Ahoy at North Sea Jazz Festival on July 11, 2014, in Rotterdam, Netherlands. Pharrell Williams performs on stage at Ahoy at North Sea Jazz Festival on July 11, 2014, in Rotterdam, Netherlands. Photo: Dimitri Hakke / Redferns via Getty Images Image 8 of 13 Singer Ariana Grande performs onstage during the iHeartRadio Music Awards held at the Shrine Auditorium on May 1, 2014. Singer Ariana Grande performs onstage during the iHeartRadio Music Awards held at the Shrine Auditorium on May 1, 2014. Photo: Mark Davis/NBC / NBCU Photo Bank via Getty Images Image 9 of 13 Singer Pharrell Williams (C) performs onstage during the BET AWARDS '14 at Nokia Theatre L.A. LIVE on June 29, 2014, in Los Angeles, California. Singer Pharrell Williams (C) performs onstage during the BET AWARDS '14 at Nokia Theatre L.A. LIVE on June 29, 2014, in Los Angeles, California. Photo: Kevin Winter / Getty Images for BET Image 10 of 13 Image 11 of 13 (L-R) Kim Thayil, Chris Cornell, Matt Cameron and Ben Shepherd of Soundgarden visit SiriusXM Studios on June 2, 2014, in New York City. (L-R) Kim Thayil, Chris Cornell, Matt Cameron and Ben Shepherd of Soundgarden visit SiriusXM Studios on June 2, 2014, in New York City. Photo: Slaven Vlasic / Getty Images for Sirius XM Image 12 of 13 Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014, in Las Vegas, Nevada. Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014, in Las Vegas, Nevada. Photo: Ethan Miller / Getty Images Image 13 of 13 Soundgarden, Pharrell Williams, Ariana Grande to perform at CenturyLink Field for Seattle Seahawks season opener 1 / 13 Back to Gallery

Famed Seattle grunge band Soundgarden will be one of three big-ticket acts playing at CenturyLink Field on Sept. 4 when the Seattle Seahawks kick off the 2014 NFL season by hosting the Green Bay Packers.

Soundgarden and Grammy Award-winning musician Pharrell Williams will perform at a free concert for the 12th Man outside the stadium gates before the Seahawks’ season-opener at 5:30 p.m. Pacific time. The music begins an hour beforehand, at 4:30, and will be broadcast on the NFL Network for the league’s festivities begin at the home of 2013’s Super Bowl champions.

Pop singer Ariana Grande is slated to sing the National Anthem before kickoff. The game will be nationally televised on NBC.

The outdoor concert is free, with the CenturyLink Field North Plaza opening to the public at 2:30 p.m.

The Seahawks will begin the defense of their Vince Lombardi Trophy on Sept. 4, playing the Packers in the first game of the NFL season. Seattle will have already played four preseason games, the first of which is this Thursday, Aug. 7, against the Broncos in Denver. The Seahawks defeated the Broncos 43-8 in Super Bowl XLVIII on Feb. 2 in East Rutherford, N.J.

Visit seattlepi.com for more Seattle Seahawks news. Contact sports editor Nick Eaton at nickeaton@seattlepi.com or @njeaton.