Who is an icon according to you?

Actresses come and go, but some names live on.

This is not an universal opinion or something, but who among the above is the most iconic according to you, and why?

I have chosen two from Hollywood and two from Bollywood.

Personal: Marilyn! There is an endless fascination with her even to this day. She wasn't the best actress of her time, but she is the epitomy of someone who "lit up the screen." I feel she has reached somewhat of a mythical status.

Audrey, Marilyn, and Madhubala - all 3 are!