Marc Jacobs — who makes his feature-acting debut in upcoming indie film “Disconnect” — gushed over meeting Oliver Stone at a VIP screening last week. Stone was then overheard asking Jacobs, “Are you a producer?” “Oliver had no idea who Marc was,” said a source. But Jacobs seemed to take it in stride. “No, I’m a fashion designer,” he replied. “I’m completely out of my world.” Also at the party at Bobby Van’s in Midtown following a MoMA screening were Christine Baranski and designers Olivier Theyskens, Brian Wolk and Claude Morais. Jacobs was also overheard saying that his biggest challenge in Henry Alex Rubin’s movie was wearing unfashionable acid-washed jeans and a hoodie for his role as a pimp. And the job was less than cushy: He had an all-night shoot in Yonkers during which he kept having to knock out Andrea Riseborough, who plays a TV journalist. Super-fit Jacobs said his favorite part of filming was “eating doughnuts with the crew on set.” The movie officially premieres on April 8 before its opening four days later.