Bollywood's little glam doll Alia Bhatt turns 21 today. Two-film-old star Alia Bhatt was born to filmmaker Mahesh Bhatt and actress Soni Razdan on March 15, 1993. Alia, who made her debut as a young, rich glamorous student in Karan Johar's 'Student of the Year', was appreciated for her performance in her second film 'Highway'.Alia is celebrating her 21st birthday not partying and chilling, but shooting for her another forthcoming film, 'Humpty Sharma Ki Dulhania' where Alia plays a Punjabi girl opposite her 'Student of the Year' co star Varun Dhawan.Alia tweeted:Morning :) thank youu all for the love and wishes!!! Love you guys :)Celebrating my birthday shooting for humpty.. Best feeling ever !!— Alia Bhatt (@aliaa08) March 15, 2014The pretty actress who has impressed all with Imtiaz Ali's 'Highway' and is ready with her third film '2 States'.Alia's chemistry with her co-star and rumoured beau Arjun Kapoor is steaming hot. Alia is looking convincing in the character she’s playing.We wish Alia Bhatt a very Happy Birthday!