Costume designed by Bob Crowley for Maggie Smith as Lady Bracknell in the 1993 production of The Importance of Being Ernest.
From the V&A

Costume from Cosprop

Edwardian costume from Cosprop

1870’s costume from Cosprop

Edwardian costume from Cosprop
Costume designer William Travilla originally created a gem-studded bikini for Marilyn Monroe to perform “Diamonds Are a Girl’s Best Friend” in Gentlemen Prefer Blondes. However, facing fallout from some nude photographs Marilyn had taken as a struggling actress several years before, the studio nixed the risqué ensemble. Travilla quickly whipped up the now-iconic pink dress to replace it.
(Source: fripperiesandfobs)