On the 71st birthday of veteran actress Saira Banu on Sunday, megastar Amitabh Bachchan wished her happiness forever.

Big B took to micro-blogging platform Twitter and wished the actress with whom he has worked in movies like 'Zameer' (1975) and 'Hera Pheri' (1976). "Saira Banu-ji many happy returns of the day, happiness always... my leading lady in many films," he tweeted along with a collage of photographs from the past.

The collage also features Saira Banu's husband, the celebrated thespian Dilip Kumar.