Reality star Stephanie Pratt was in a Los Angeles court on Friday and pleaded not guilty to misdemeanor DUI.  If convicted, the actress could face up to six months in jail and a $1,000 fine.

In in effort to be viewed favorably by the court before final sentencing, The Hills actress will enroll in a 30-day residential rehabilitation program.

Pratt was arrested last month after partying with her brother and sister-in-law Spencer Pratt and Heidi Montag – details and photos here.

Photo:  WENN

Filed under: Celebrities