Madhubala is the odd one out because she belongs to an earlier generation of Bollywood actresses (active 1940s-1960s), while Hema Malini, Vidya Balan, and Rekha are from later generations (1970s onwards). Madhubala, known as 'The Venus of Indian Cinema,' passed away in 1969 at age 36, while the others are contemporary or from later eras. She never worked with the younger actresses listed.