“The Princess Bride” star Carey Elwes , “Rescue Me” actor James McCaffrey , and Sudbury’s own Chris Evans, sometimes known as Captain America, are among the big names who’ll appear at the 28th Boston Film Festival, which will be held at Theatre 1 at the Revere Hotel Boston Common from Sept. 20 to 24. Elwes will promote his drama “The Citizen,” McCaffrey will screen “To Redemption,” and Evans will talk about “Stranglehold: In the Shadow of the Boston Strangler,” which he voices for director Myles Jewell . (Evans was just at the Toronto International Film Festival promoting one of his other new releases, “The Iceman,” with Winona Ryder .) There’s a full schedule for the Boston Film Festival online.