The blonde bombshell's billowing frock from the 1955 film has been named the favourite in a survey conducted by the British Heart Foundation, reported Daily Express.
The romantic comedy starred Tom Ewell as a publishing executive who is infatuated with Marilyn's character 'The Girl' and watches as her dress flutters as a train passes below ground.
In second place was Dorothy's gingham dress and ruby slippers, worn by Judy Garland in 1939 classic 'The Wizard Of Oz'.
Original Bond girl Ursula Andress's white bikini from 'Dr No' and Audrey Hepburn's stylish black dress and pearls in 'Breakfast At Tiffany's' also made it into the top five.
'Baywatch's red swimming costume, Michael Jackson's red leather 'Thriller' suit and animated Jessica Rabbit's plunging red evening gown in 'Who Framed Roger Rabbit'? were in the top 10.