On Mani Ratnam`s 67th birthday, actor-politician Kamal Hasan penned a note for the filmmaker, whom he called "doyen of Indian cinema who has touched the hearts of millions."

Kamal, who lent his vocal prowess to Ratnam`s `Ponniyin Selvan 2`, took to Twitter to pen the note: "If one were to count life by the happiness that they create around them and if age is calculated by the friends around you, my dear #ManiRatnam you are going to be a much older man today! A doyen of Indian Cinema who has touched the hearts of millions through his art and one who transformed dialogues into a lovely visual experience."