Kuch Kuch Hota Hai (1998)

Rahul (Shah Rukh Khan) and Anjuli (Kajol) were best friends in college, but their relationship stagnated when Anjuli was unable to tell Rahul how much she loved him. In the interim, Rahul met and married Tina (Rani Mukherjee). But when Tina dies in childbirth, she leaves her infant daughter a series of letters to read (when she grows up), imploring her to find Rahul's college lover so that he may begin again.