That Mischa Barton is a real pro. Mischa has been cast as a prostitute on an upcoming episode of NBC’s long-running crime drama Law & Order: Special Victims Unit, and the former star of The OC was photographed filming scenes for her guest appearance in New York City’s Meatpacking District over the weekend. Mischa makes her SVU premiere on Wednesday, March 3. The 23-year-old’s last television appearance, the Ashton Kutcher-produced The Beautiful Life, was axed by The CW last fall due to poor ratings.