Who Invented The Bikini?

According to official records, Louis Reard, an engineer and Jacques Heim, a fashion designer, both French nationals, are credited with the invention of the bikini.

The first two-piece bathing suit was a string bikini with a g-string at the back in Paris, France in 1946. It made its debut at a fashion show on July 5, 1946 at Piscine Molitor in the French capital. It was named after Bikini Atoll in the Marshall Islands, which had witnessed the testing of nuclear weapons a few days before the invention of the bikini. The logic behind the choice of name for this type of skimpy women's bathing suit was that it was expected to cause as much excitement and evoke as much interest the world over as the testing of thermonuclear devices had done just a few days before its invention.   

I thought the Romans invented the bikini.. Am not too sure though.