Rekha and Amitabh Bachchan in Silsila. Despite a choppy ending, a phenomenal film that's as close to perfection as can be from the Bollywood of the 1980s.
Rekha was 27 at the time - the absolute zenith of her epic Indian beauty captured in this (and Umrao Jaan) film. Her co-star, Amitabh Bachchan was 38. The magic and chemistry of these two superstars (both have that rare combination of star appeal, fine acting chops, sensational screen presence, fandom, stardom et al) is the magic of Bollywood.