Imtiaz Ali is an Indian filmmaker. He is best known for writing and directing the romantic comedies Jab We Met and Love Aaj Kal, and the dramas Rockstar, Highway, Tamasha, Jab Harry Met Sejal, and Amar Singh Chamkila. From Wikipedia
The collaboration marks a 'full circle' moment for Raina, who began his career with Roshan, as the Bollywood star builds anticipation for War 2's release.