India, Jan. 22 -- As Rani Mukerji celebrates 30 years in cinema, an unexpected moment during a recent event left everyone in the audience teary-eyed. The actor was in conversation with filmmaker Karan Johar when he surprised her by reading out a handwritten letter from her daughter, 10-year-old Adira. The note, written specially to mark Rani's milestone year in films, was addressed simply to 'Mamma'. In a viral clip from the event, Karan reads the letter slowly to the audience and a teary-eyed Rani.

"Hello Mama, first of all I just want to say how much I love you. You are the best mother in the world. We have shared countless memories together, joyful, tearful and of course funny. There are some qualities I like about you, some qualities...