The actor, who played Oliver Oken on the hit Disney programme, was taken into custody on 16 October (11) after failing to slow down for police who were directing traffic in Burbank, California.

He failed a breathalyser test and was subsequently charged with two counts of driving while drunk.

Musso's attorney Blair Berk appeared in a Burbank court on Friday (09Dec11) to enter the plea on her client's behalf. The 20-year-old actor did not attend the arraignment hearing.

A pre-trial status conference has been set for 10 February (12) to determine if the case should go to trial, according to Eonline.com.

If convicted, Musso faces up to six months behind bars and a $1,000 (£625) fine.