Your Saturday night plans just got a lot cheaper. Prudential Center’s free outdoor movie series is back through August 29, with everything from Lilo & Stitch and Camp Rock to Mamma Mia! playing under the stars. Each movie night also includes live music before the film, plus rotating food vendors, local retailers and complimentary popcorn while supplies last. Bring a blanket, grab dinner nearby and settle in for one of Boston’s best free summer traditions. Media via pruboston #mustdoboston #bostonoutdoormovies