Backstreet Boys singer Nick Carter will compete on Dancing with the Stars season 21.
The 35-year-old star confirmed the news by sharing a compilation video of several past routines Wednesday on Twitter, writing, "You ain't seen nothing yet." Carter joins previously announced celebrity contestants Bindi Irwin and Victor Espinoza.

"I never considered myself a great dancer," he told Us Weekly. "Even though funny enough I've danced my entire life, I might have had a little insecurity on that end. But I felt this time around I had some time and I think it'll be a cool experience. I think they can teach me some stuff."

Carter's younger brother, Aaron Carter, was partnered with professional dancer Karina Smirnoff on season 9, and inspired him to join the show. The singer's former 'N Sync rival, Joey Fatone, also lent encouragement, telling Carter he had a great experience in seasons 4 and 15.

    You ain't seen nothing yet. #DWTS @DancingABC #NickCarterDWTS pic.twitter.com/qfg4FcPxWl
    — Nick Carter (@nickcarter) August 26, 2015

    We initiated @nickcarter into #dwts by asking him if he can do the Whip/Nae Nae. See for yourself! https://t.co/jWYiblLXNY
    — Official DWTS (@DancingABC) August 26, 2015

Smirnoff, Derek Hough, and Val Chmerkovskiy are among the professional dancers who will return for season 21. The remaining celebrity contestants will be announced in the coming days ahead of the show's premiere Sept. 14 at 8 p.m. ET on ABC.