LGjr-RG, PacificCoastNews It looks like Hilary Duff 's relationship with her trainer Jason Walsh took a romantic turn! The actress and her fitness guru, who have been seen enjoying each others' company for some time now, are "casually dating," a source tells E! News. The casually clad couple were most recently spotted stepping out together in Manhattan's Soho neighborhood earlier today. Duff was strutting a striped long-sleeve tee with denim shorts and a black hat, while her beau rocked a black cap and shades with his plain gray T-shirt and jeans.