Reality TV star Stephanie Pratt has agreed to undergo 30 days in rehab as part of her ongoing drink-driving case.

The Hills star was arrested last month after she failed a breath test in Los Angeles and she was formally charged with driving under the influence.

She pleaded not guilty to the misdemeanor, and in a hearing in Los Angeles on Friday the 23 year old has now agreed to spend a month in a rehabilitation center.

If convicted of the offense, Pratt could face up to six months in jail and a $1,000 fine.

Stephanie Pratt Gallery

(This news article provided by World Entertainment News Network)