Alia Bhatt, Sidharth Malhotra and Varun Dhawan, who were introduced to Bollywood by hit film-maker Karan Johar, have always considered the "Student of the Year" director as their mentor.
The trio has wished their favourite director and friend on his 43rd birthday on Monday, 25 May.
Varun has even dedicated the "Happy Birthday" song from his upcoming film "ABCD 2" to Karan on his birthday. The team of "ABCD 2" had released the song, sung by Varun, Sachin Sanghvi, Jigar Saraiya and D Soldierz, on Sunday.
Other B-town celebs, including Abhishek Bachchan, Shraddha Kapoor, Kriti Sanon, Neha Dhupia, Vishal Dadlani, Tanishaa Mukherjee, Sophie Choudry and Bipasha Basu have also wished the "Kuch Kuch Hota Hai" director and the "Bombay Velvet" actor a very happy birthday.
Check out birthday wishes to Karan Johar below:
Happy birthday to my favourite @karanjohar !!!!! Love you love you to the stars and back
Happy birthday @karanjohar thank you for being the way you are,love you for it,big hug
— Varun SURESH Dhawan (@Varun_dvn) May 25, 2015
To a big brother, a friend and all round great guy. Happy birthday @karanjohar never change!! Biggest hug.
Happy birthday @karanjohar ! Wish you never ending happiness, success & hit movies for life! ☺️❤️
Happy happy birthday @karanjohar !! Have a greeeaattt year ahead!! Lots of love & a Bigggg hugg!!
Happy happy happy birthday @karanjohar .... Big love !
Happy Birthday, @karanjohar ! Have a spectacular year! :)
Happy Birthday Karan. To always growing but never growing old! @karanjohar
Happy b'day to the one with the biggest heart, sharpest wit, beautiful mind & toooo much talent! Hv a fab year! Biggest hug @karanjohar
Happy happy birthday to the guy who has the most wicked sense of humour n enviable wit.The super fun @karanjohar !Love always
@karanjohar Heyyy Karan .. Wish you a very Happy birthday and an awesome year ahead.....