The "Khalnayak" star, who has given hits like "Munna Bhai M.B.B.S.", "Vaastav: The Reality" and "Saajan", is in jail for illegal possession of arms during the 1993 Mumbai bomb blasts and riots.
On his birthday, some of the celebrities took to the micro-blogging site Twitter to wish the actor:
* Ajay Devgn: A very happy birthday to my elder brother, waiting for you to come.
* Anil Kapoor: Happy Birthday to the original stud @duttsanjay. You'll always have our love and support, waiting for you to come back!
* Anubhav Sinha: The last one away from home brother man. Happy Birthday Sanjay Dutt!!!
* Rana Daggubati: Wish the coolest and the toughest of them all a very happy birthday!! The SanjayDutt!! Waiting for you sir!!
* Ali Fazal: Happy birthday Baba. Wish you many many happy returns of the day. Come back soon @duttsanjay.
* Milan Luthria: Wishing my buddy @duttsanjay a very happy birthday! And missing him.
This too shall pass my friend.
* Raj Kundra: A very happy birthday to my brother @duttsanjay missing you bro. You will be with us very soon. @maanayata_dutt.
* Esha Deol: Happy birthday Sanju sir! Love you loads always a fan of you.
* Sophie Choudry: Happy birthday @duttsanjay. Missing you and waiting for your return! There can be no greater gift than freedom which you will have soon.