Locally made movies had some big premieres over the weekend. After showing her Hub comedy “The Heat” at AMC Loews Boston Common last week, Sandra Bullock was in New York City for a Ziegfeld Theatre premiere with her costars Melissa McCarthy and Boston’s own Joey McIntyre, who plays McCarthy’s brother in the film. On the West Coast, local guy Nat Faxon and his collaborator, Jim Rash (the two won an Oscar for the screenplay for “The Descendants”), premiered their South Shore-based film, “The Way, Way Back,” as part of the Los Angeles Film Festival. They were joined by Marshfield’s Steve Carell, who helped get the film made close to home, and his costars Toni Collette, AnnaSophia Robb, and young actor Liam James. The film stars James as a teen who escapes his family by getting a job at a water park, which happens to be Water Wizz in East Wareham.