Reportedly based on Princess Margaret’s adventures in Italy, William Wyler’s timeless rom-com Roman Holiday tells a Cinderella story in reverse. Shot on location in Rome, the 1953 film follows curious Princess Ann (Audrey Hepburn) out of her royal confines and into the streets as she defects from a tedious tour of European capitals. Loopy from sedatives, Ann falls asleep in a park and lands in the care of Joe Bradley (Gregory Peck), an expatriate journalist tempted to cash in on his candid brush with royalty. Originally attributed to Ian McLellan Hunter, Roman Holiday’s Oscar-winning script is the work of Dalton Trumbo, a blacklisted writer who spent 10 months in prison after refusing to testify before the House Un-American Activities Committee. Slab Cinema screens the classic as part of its Starlight Movies in the Garden Series. Free, gates at 7:30pm, film at dusk Friday, San Antonio Botanical Garden, 555 Funston, (210) 207-3250, slabcinema.com.