"She was cooperative and there were no issues with her arrest."
The 23-year-old was charged with a misdemeanor and transferred to the Van Nuys jail for booking, according to People, which added she was subsequently released around 10:30AM.
Pratt had been at a birthday party for former I'm a Celebrity... Get Me Out of Here! participant Holly Montag at L.A. nightclub Empire, according to People.
"Just finished dinner and going to Empire but im pretty tired aka yes i am the party pooper :(" wrote Pratt in a posting to her Twitter account around 11PM.
While Pratt can currently be seen on The Hills' fifth-season episodes -- which air in the Tuesdays at 10PM ET/PT timeslot on MTV -- she recently stated that she's not sure how much more filming of the reality series she can take.
DISCUSS AND COMMENT ON THIS STORY Reality TV World now offers Facebook Comments on our stories. To post a comment, log into Facebook and then 'Add' your comment. To report spam or abuse, click the 'X' in the upper right corner of the comment box. Get more Reality TV World! Follow us on Twitter, like us on Facebook or add our RSS feed.