'Dancing with the Stars,' Season 21: Andy Grammer Joins the Celeb Cast

— -- Andy Grammer is joining "Dancing with the Stars."

The "Honey, I'm Good" singer confirmed via social media that he will be taking part in the 21st season of the show.

"[The] rumors are true!" he said in a video. "I'm doing 'Dancing with the Stars!'"

Grammer, 31, is the eighth person to announce his participation. Bindi Irwin, Victor Espinoza, Nick Carter, Hayes Grier, Alexa and Carlos PenaVega and Chaka Khan will also be competing on the ABC show.

"Dancing with the Stars" returns Sept. 14.