While many of us spent summers at camps swimming in lakes and decoupaging ceramic mugs, these future celebrities spent their time honing their craft and practicing for their close-ups. From Natalie Portman to Robert Downey Jr., some of Hollywood’s brightest and biggest future stars spent time in upstate New York at Stagedoor Manor, an exclusive performing arts camp to future thespians. Get ready to roast up some marshmallows and macramé some picture frames—here are seven celebrities who went from kumbaya to celebrity stardom.