NEW YORK (AP) -- L'Wren Scott, a fashion designer and celebrity stylist who was Mick Jagger's girlfriend, was found dead in Manhattan of a possible suicide, a law enforcement official said Monday. The official spoke to The Associated Press on condition of anonymity because the victim's next of kin had not yet been notified. The official said Scott's assistant found her hanging from a doorknob at 10 a.m. Monday. The official said no note was found and there was no sign of foul play. A spokeswoman for Mick Jagger says the singer was "completely shocked and devastated by the news." The Utah-born Scott had her own fashion label popular with celebrities. She was a fixture on Jagger's arm and, at around 6-foot-3, towered over her famous boyfriend. She founded her high-end label in 2006 and recently created a more affordable line of clothes with Banana Republic. On the red carpet, she has dressed stars like Nicole Kidman, Oprah Winfrey, Sarah Jessica Parker and Angelina Jolie. Just last month she canceled her London Fashion Week show, due to reported production delays.