Watch Melissa McCarthy Become Sean Spicer in Hilarious 'SNL' Promo

Actress turns into White House press secretary to tune of 'West Side Story' song "I Feel Pretty"

Melissa McCarthy transforms from Hollywood star into White House press secretary Sean Spicer in a promo for the actress' upcoming 'SNL' episode.

Comedian Melissa McCarthy transforms into White House press secretary Sean Spicer in a promo for the actress' upcoming Saturday Night Live episode.

McCarthy, who has appeared as "Spicey" three times unannounced during this season of SNL, waltzes into Studio 8H to the tune of West Side Story's "I Feel Pretty." After meeting with SNL's makeup artists – played by cast members Mikey Day and Melissa Villasenor – McCarthy morphs into Spicer, who then dances around the SNL set.

The promo all but seals the fact that McCarthy will reprise the "Spicey" role this weekend when she hosts this week's SNL, which will air live coast-to-coast. The episode marks McCarthy's fifth time hosting SNL. The rock trio Haim will perform as musical guest.