HARVEST TIME: Tilda Swinton, who took in the Pringle show, confirmed that she will appear in the brand’s fall 2011 campaign — and an intense new movie. She is finishing up “We Need to Talk about Kevin,” based on Lionel Shriver’s acclaimed, epistolary novel of the same name. She plays the mother of a murderous teenager, and said the movie should be wrapped in time for the Cannes film festival. “I’ve had quite a harvest, with ‘I Am Love’ and ‘Julia,’ both of which took a long time to make, so I’m taking a break,” said Swinton. Over the summer, she’ll begin filming “Moon Rise Kingdom,” a Wes Anderson film that will also star Bruce Willis, Edward Norton and Bill Murray. As for the upcoming Pringle spots, Swinton said a location hasn’t been chosen yet. Past campaigns have been shot near her home of Nairn, in the Scottish Highlands. “Wherever it is, it will be very Scottish,” she assured.