The Nantucket Film Festival has announced some stars — and a change — in its lineup. “Newsroom” actress Emily Mortimer, who was set to present the Screenwriter’s Tribute award to Aaron Sorkin during the event, can’t make it to the island on June 28, so she’s been replaced by Bradley Whitford who was on Sorkin’s show “The West Wing.” Also in the lineup for the weekend are actor-comedian Billy Eichner, “Obvious Child” star (and Milton native) Jenny Slate, and “Kroll Show” writer Ron Funches, who will particiapte in the All-Star Comedy Roundtable on June 29 moderated by Michael Ian Black. And before that, on June 26, Fred Willard, Anthony Edwards (of “ER”), and Tom Cavanaugh (of the TV show “Ed”), will participate in a staged reading of the television pilot “Strange Calls,” written by Donick Cary, who’s been a producer and writer on “Parks and Recreation,” “New Girl,” and “The Simpsons.” “Strange Calls” actually takes place on Nantucket and is about a former Boston cop who answers weird phone calls that come into the station. The festival runs June 25-30.