Today is Bollywood icon Dharmendra's 81st birthday and Amitabh Bachchan took to Twitter to share a sweet post to mark the iconic actor and friend's birthday!

Both the actors have always been vocal about their mutual admiration for each other. Infact, dharam paaji calls Amitji the "Engine" of Hindi Film Industry! The two, whose on-screen bromance in films like 'Sholay' and 'Chupke Chupke' endeared them to the audience, have kept their friendship alive even though they don't get to share screen space now. So it came as a no surprise when the Big B decided to mark the birthday with a behind-the-scenes shot from the making of the film, where their camaraderie is obvious.