Initially the T-shirt was worn exclusively as an undergarment,but that changed in the 1950s.At that time,the actors John Wayne, Marlon Brando,and James Dean all shocked the American movie-going public by wearing their underwear on the big screen. In 1951, Marlon Brando caused a sensation in his film A streetcar Named Desire when his T-shirt was ripped off his body to reveal his naked chest.Then Jame Dean made the T-shirt a contemporary symbol of rebellious youth in the movie Rebel without a Cause . Once Hollywood caught on to the T-shirt,its popularity soared.