Some find him inspirational, some say he is the most passionate actor! Bollywood celebrities like Anupam Kher, Subhash Ghai and Riteish Deshmukh tweeted birthday wishes for the "evergreen" Dev Anand Monday.

The actor turned 88, and his zest for life remains unmatched. He has already been promoting his directorial project "Chargesheet", and is working on a sequel to his 1971 film "Hare Rama Hare Krishna".

Here's what the celebrities tweeted for the star:

Anupam Kher: Dev Saab is one of the main reasons of me being in films. Bunked school to watch his movies. Happy Birthday YOUNG man. You inspire us.

Riteish Deshmukh: Wishing Dev sahab a very happy birthday. The original chocolate hero-wishing you a very happy birthday sir - you are truly inspirational.

Farhan Akhtar: Happy birthday Dev saab... your joie de vivre is inspirational.

Subhash Ghai: Wishing a very happy birthday to the evergreen Dev Anand! Your energy and charm are highly inspiring Dev Saab.

Madhur Bhandarkar: Wishing Dev Anand saab many happy returns of the day. Have an EVERGREEN rocking birthday blast, sir!!!

Gaurav Kapur: The best thing about Dev saab is the fact that he follows his passion relentlessly, with caring a damn about what the world says. Now you may not agree with some of his recent films, but you would agree that we could all use some of that passion and resilience. Happy birthday Dev saab.

Viveck Vaswani: Happy birthday Dev Saab! Live to be 100!

Koel Purie: Happy birthday @itsmedevanand. Enjoy turning a year younger. Love.