The screenwriter, 48, - who wrote and produced the film - looked radiant for the event held in Jeddah, Saudi Arabia, where she wore a plunging black and silver gown.
Dozens of rowdy demonstrators regularly gather outside Ormeley Lodge, the childhood home of Jemima Khan in South-West London, in protests against her ex-husband Imran Khan.
Imran Khan organised a march on Islamabad to pressure Prime Minister Shahbaz Sharif s government to hold early elections but Sharif says elections will take place as scheduled, in 2023.