American actor Billy Porter wore a black velvet tuxedo dress designed by Christian Siriano on the red carpet of the 91st Academy Awards on February 24, 2019. At the time, Porter had recently come into public view for his breakout role in the FX television series Pose and had been receiving attention for his boundary-pushing red carpet attire during the 2018–19 film awards season. Following his appearance at the 76th Golden Globe Awards in a custom silver suit with fuchsia-lined cape, he was invited to host red carpet interviews at the upcoming Oscars pre-show. Porter approached Siriano and together they conceived the tuxedo gown.
The gown was well received by fashion journalists, who highlighted its elegant design. It cemented Porter's status as a celebrity and as a fashion icon. Critics have described it as a favorite Oscars dress and one of Porter's most fashionable red carpet looks. Porter considers the outfit a piece of political art intended to drive a conversation about men's fashion and masculinity, for which it has received praise from fashion writers, academics, and the general public, as well as criticism from conservative commentators.