India, Sept. 7 -- Malayalam stars Mohanlal and Mammootty might have been considered rivals professionally for more than four decades, as they vied for the top spot in Mollywood. But in reality, the duo remain steadfast friends. So much so that on the occasion of Mammootty's 74th birthday on 7 September, Mohanlal even paid him tribute on the latest episode of Bigg Boss Malayalam. (Also Read: Mammootty talks with excited fans lined up outside his Kochi home on 74th birthday. Watch)

On the Sunday episode of Bigg Boss Malayalam, Mohanlal wore a colourful shirt. But a closer look reveals that it is printed with various iconic pictures of Mammootty through the years. Asianet, the channel on which BB Malayalam is telecast, posted a video on Ins...