steve-oJackass Steve-O has revealed that his friend and co-star Johnny Knoxville worried he was back on drugs because he was so excited about signing up for the next season of Dancing with the Stars.

Steve-O, real name Stephen Glover, had been drug-free since entering rehab in March last year. He entered treatment after friends including Knoxville encourage him to submit to a psychiatric hold and he realised his drug use was hurting those he loved.

Writing on his blog about signing up for the US dance-off, he explained it was difficult keeping the news a secret: “I was squirming around and [Knoxville] says he was thinking that ’sobriety really had my back up against the wall’.

“Knoxville thought I was having unbearable cravings for drugs and alcohol but, really, I was just dying to tell him that I was going to be dancing.

“When I wound up telling him [after about five minutes], he told me how worried I’d had him.”

Steve-O will appear on the show alongside Lil’ Kim and Denise Richards. The series will begin next month.