His friends and co-workers like Shraddha Kapoor and Aditi Rao Hydari wished him an "amazing" year full of happiness, luck and laughter.
Farhan, who is the son of screenwriters Javed Akhtar and Honey Irani, is a film director, screenwriter, producer, actor, playback singer and lyricist. He began his career in Bollywood by working as an assistant director in "Lamhe" and "Himalay Putra".
Farhan made his directorial debut in 2001 with "Dil Chahta Hai", and started his acting career in 2008 with "Rock On!!".
Here's what the celebrities had to say:
Kunal Kohli: Farhan Akhtar happy birthday buddy and as you say Twitter pe toh banta hai (should go on Twitter).
Riteish Deshmukh: Hey brother Farhan Akhtar have a blessed one... happy birthday Namdev hupp!
Shraddha Kapoor: Happy happy birthday Farhan Akhtar keep shining! Big hug.
Nikkhil Advani: Happy birthday Farhan Akhtar. Here's to a totally rocking year buddy. Cheers!
Aditi Rao Hydari: Happy birthday! Farhan Akhtar to a year full of music movies and epic joy! Big hug
Sajid Khan: Happy birthday brother Farhan Akhtar have a great one.
Dia Mirza: Dearest Farhan Akhtar happy birthday! More power to your voice that chooses to make a difference in so many ways...Keep shining! Big love