The "Aisha" star, who is the daughter of actor Anil Kapoor and made her debut in Bollywood with "Sawaariya" in 2007, is known for her great fashion sense.
"Happy birthday Sonam Kapoor! Stay gorgeous and have the best year ahead! Lots and lots of love!," posted Karan Johar.
Close friend Shahid Kapoor said, "Sonam Kapoor Here's wishing you the bestest year ... Happpy b'day."
"Happy Birthday Sonam Kapoor, may you have a great year ahead," said Genelia D'souza.
"Happy bday Sonam Kapoor! Hope you have a super year girl!!!," tweeted Priyanka Chopra.
Singer Shreya Ghosal tweeted, "Happy birthday Sonam Kapoor Have a super duper one."
"Sonam Kapoor, my heartiest wishes to you on your Birthday. Have a successful year filled with success and glory," said filmmaker Madhur Bhandarkar.
"Happy Happy Birthday Sonam Kapoor ! Stay pretty and adorable forever!Love n a Huge Hug!," posted Bipasha Basu.
"Sonam Kapoor wishing you a a super duper Birthday - have a great one," posted Riteish Deshmukh.
