Rock on: Friends from B-Town welcome Farhan to 40s

Actor-filmmaker Farhan Akhtar, who has delivered hits like "Bhaag Milkha Bhaag" and "Rock On!!", turned 40 Thursday, and his friends from the film fraternity wished him more power and success.

Here's what celebrities like Arjun Rampal, Karan Johar and Abhishek Bachchan posted on Twitter:

Arjun Rampal: Happy birthday Farhan Akhtar. Mere dost mere bhai (my friend, my brother). Welcome to the 40s and rock on forever. Love and a big hug.

Karan Johar: Happy Birthday Farhan Akhtar! Known you for over three decades and here's to many more! Big love and all the happiness! Huge hug!

Abhishek Bachchan: Here's wishing my buddy Farhan Akhtar the happiest birthdays of all. Bas tu bhaag Farhan! Big love.

Farah Khan: Happy birthday to Farhan Akhtar and me, the only two members of "Capri9" (Capricorn Jan 9).

Nikhil Advani: Happy birthday. Power to you and how you've constantly been changing the film scene. Showing all of us the way it can be done.

Arshad Warsi: Happy Birthday to the super talented Farhan Akhtar. Bhaagwati.

Ehsaan Noorani: Happy Birthday Farhan Akhtar. Have a super one bro!

Punit Malhotra: Farhan Akhtar, Happy birthday. Hope you have a super day and a rocking year ahead.

Riteish Deshmukh: Bas tu Bhaaag Farhan Akhtar - janamdin ki haardhik shubh kaamnayein (keep running Farhan Khan - wish you happy birthday).

Shekhar Ravjiani: Happy Birthday Farhan! Rock on brother

Satish Kaushik: Wishing you a happy birthday my dear. More happiness, more success is in store for you. Proud of you 'Milkha'.