Captain Carter is a character in Marvel's What If...? streaming on Disney+. She stars in the first episode of the animated series, titled "What If...Captain Carter were the first Avenger?" In this universe, Peggy Carter receives the super soldier serum instead of Steve, thus becoming the hero dubbed Captain Carter. As opposed to Captain America's stars and stripes, this costume uses a Union Jack as its emblem as a nod to Peggy's background. She even has her own matching shield. Hayley Atwell, who portrays Peggy Carter in the movies, voices her animated counterpart. Spoilers: Hayley makes a cameo in Doctor Strange: Multiverse of Madness as a live action Captain Carter.

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