LOS ANGELES (Reuters) - Actress Katherine Heigl, an Emmy-winning star of medical drama "Grey's Anatomy," married her musician boyfriend in Utah on Sunday, US Weekly magazine reported on its Web site. Heigl, 29, and Josh Kelley, 27, tied the knot under a marquee at a resort in Park City, Utah. Among the guests at the black-tie ceremony were Heigl's co-stars Sandra Oh, Kate Walsh and T.R. Knight, the magazine said. -snip-