Bollywood star Alia Bhatt on Thursday mourned the demise of her `Humpty Sharma Ki Dulhania` co-star Sidharth Shukla. Sidharth, who made his Bollywood debut in 2014 with `Humpty Sharma Ki Dulhania`, starring Varun and Alia in the lead roles, died of a heart attack on Thursday. Taking to her Instagram story, Alia shared a throwback monochrome picture featuring herself with Varun and Sidharth posing at a promotional event for their film.

Alongside the snap, she wrote, "Sid, one of the warmest, kindest and most genuine people I`ve worked with...always smiling and always positive! My heartfelt condolences to his family, loved ones and his fans who loved him so so deeply! Rest in peace!"