Thoroughly Modern Millie stars Mark Kudisch and Sheryl Lee Ralph help keep their leading lady, Sutton Foster, straight at a press preview for the show. Millie had a tryout at the La Jolla Playhouse in 2000 and will begin previewing March 19 at Broadway's Marquis Theatre. The Michael Mayer-helmed musical will open April 18 starring Sheryl Lee Ralph, Harriet Harris, Mark Kudisch and newcomer Sutton Foster as the title role.