Around 1m13s in the video, there is a close shot of a kid on a chair. Next to him there's a He-Man doll. Dolph Lundgren played He-Man in the movie.
The song was released on February 1, 2017 through Interscope and KIDinaKORNER as the lead single from the band's third studio album, Evolve.
In November 2016, Dan Reynolds told People that the song was inspired by his experiences with ankylosing spondylitis in 2015.
The music video was released on March 7, 2017 and features a boxing match between Dan Reynolds and Dolph Lundgren.
"Believer" reached number four on the Billboard Hot 100, and topped the Billboard Hot Rock Songs.