'Brahmastra' producer Karan Johar has said actors Ranbir Kapoor and Alia Bhatt have given seven years to the film "without questioning". "Alia grew up with 'Brahmastra'. When she signed [it], she was 21. I mean, she's 28 today and...when [it'll] release, she'll be 29," he added. Karan further said director Ayan Mukerji "relentlessly worked" on the film for seven years.