Gary Busey will compete on the next series of 'Dancing With The Stars'.

The 71-year-old actor - who has appeared in movies including 'Fear and Loathing in Las Vegas' and 'Point Break' - revealed on 'Jimmy Kimmel Live' that he has signed up to take part in season 21 of the celebrity dancing contest this autumn.

Arriving in to the studio on a horse, Gary joked he had signed up because: ''I didn't have anything else to do.''

Gary is no stranger to reality TV shows, having appeared on 'Celebrity Apprentice' and the UK's 'Celebrity Big Brother'.

He is the ninth contestant to be announced; joining Bindi Irwin, Victor Espinoza, Hayes Grier, Alexa and Carlos PenaVega, Chaka Khan, Andy Grammer and Nick Carter on the ABC show.

Backstreet Boys singer Nick recently revealed that he has his friend and former pop rival, 'N Sync's Joey Fatone - who competed on seasons four and 15 - to thank for persuading him to sign up.

Nick said: ''I'm excited. [Joey] talks about it all the time and I was really debating if I wanted to do it, and he said, 'It's a great experience, it keeps you in shape and it'll teach you a lot of stuff. 'You'll get what you put into it.' And I'm a hard worker, so I think it'll be fun.''

'Dancing With the Stars' starts on Monday September 14 on ABC.