Top 10 Classic Movie Performances That Cemented Actors and Actresses as Sex Symbols

Jennifer Lawrence in The Hunger Games

Robert Downey Jr. in Iron Man

Robert Downey Jr. shows flash, pizzazz, and confidence. As Tony Stark, a playboy by reputation, he could get any woman he wanted. As Iron Man, he was the world's savior.

Daniel Craig in Casino Royale

When Daniel Craig came out of the ocean in those blue hot pants, women couldn't control themselves.

Chris Pratt in Guardians of the Galaxy

Chris Hemsworth in Thor

Chris Evans in Captain America: The First Avenger

Bruce Willis in Die Hard

Marilyn Monroe in The Seven Year Itch

Great list. Certainly thought provoking, and yes, her most iconic scene is in this film, and I guess that probably did cement her as a sex symbol.
This film was released in 1955, and I noticed that Niagara, Gentlemen Prefer Blondes, and How to Marry a Millionaire were all released in 1953. So were I around in these times and had seen all these movies, I personally would have considered her a sex symbol already.
Fascinating list. Just one question. What would you consider the end of the classic movie era, just so I know what I can or cannot add.