Three Tony Award winners—Patti LuPone (LEFT), Audra McDonald (FAR RIGHT) and Michael Cerveris (RIGHT)—will star in a concert version of the ground-breaking 1984 musical, Sunday in the Park with George, at the Ravinia Festival in Highland Park, Sept. 3-5. Ya’ need more? Well, the show’s authors—Stephen Sondheim himself and James Lapine—will be at Ravinia on Sept. 4 to offer a pre-show talk at 7 p.m. Also, the great Sondheim musical director, Paul Gemignani, will conduct the performances. Even Stage Door Jonny wouldn’t miss this one. Would you? Lawn tickets are only $10, but any musical theater diva worth the title wants to SEE these stars. Pavilion seating, $55-$95; (847) 266-5100.