Before Kanye West showered Julia Fox with Birkin bags , she was stealing from Betsey Johnson, the “Uncut Gems” star revealed at the Accessories Council Excellence Awards on Tuesday night. And retired newsman Brian Williams has his eye on her. Johnson presented Fox with the Betsey Johnson Iconoclast Award and the 83-year-old fashion legend even dropped down to do one of her signature splits on stage. “I’m sorry I can’t do any cartwheels or splits,” Fox quipped before accepting her award. Julia Fox admitted to stealing from Betsey Johnson when she was in middle school. MediaPunch / BACKGRID Johnson presented Fox with the Iconoclast Award. Andrew H. Walker/Shutterstock Fox shared she told Johnson of her shoplifting days before she told the crowd. Getty Images for Accessories Council “Ok, but let’s be serious. Thank you so much Betsey. It’s an honor to be in the same room with you, let alone to receive an award from you and I really mean that,” she said.…