Reality TV star Stephanie Pratt has been arrested on suspicion of driving under the influence (DUI) in Hollywood. The 23-year-old star of The Hills was stopped by police at 3:45 am on Sunday morning, reports TMZ.com.

Pratt, who's brother is Spencer Pratt and sister-in-law is Heidi Montag, was taken into custody and her bail set at $5,000.

The television star celebrated Montag's birthday at a party on Saturday night prior to her arrest.

She was still in custody as WENN went to press.

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(This news article provided by World Entertainment News Network)