New Delhi : 'Student Of The Year' debutante Alia Bhatt has turned 20 today. She is the youngest actress in Bollywood right now. Alia is the daughter of filmmakers Mahesh Bhatt and Soni Razdan. She made her acting debut at the age of 19 with Karan Johar's Student Of The Year. She is the half sister of Pooja Bhatt, and Rahul Bhatt. She worked as a child artiste in her father's movie Sangharsh. She played younger Preity Zinta in the movie. We bring to you rare pictures of Alia Bhatt and her family--: Alia Bhatt with sister Pooja Bhatt and father Mahesh bhatt . Alia followed strict diet under daddy Mahesh Bhatt's supervision for 3 months. Alia Bhatt with her girlfriends .Salman Khan with baby Alia Bhatt. Alia Bhatt with sister Pooja Bhatt and brother Rahul Bhatt. Alia with Father Mahesh Bhatt. Alia Bhatt in the film Sangharsh. Alia with sister Pooja Bhatt. Alia Bhatt looks cute in this pic. Alia Bhatt is not a gym freak but she does visit gym 3-4 days in a week.Alia Bhatt's childhood picture.This cute girl without makeup .Alia Bhatt with co-star Sidharth Malhotra and Varun Dhawan .Alia didn't want to be launched by her dad Mahesh Bhatt.Alia left school to do Student Of The Year.