Atwell first played Peggy Carter in 2011's Captain America ... Peggy who received the super soldier serum in What If...?. The actress reprised the role of this Peggy variant, called Captain ...

WASHINGTON — Actress Sian Barbara Allen, who played the lead role in “Scream, Pretty Peggy” and was John-Boy’s love interest in two episodes of “The Waltons” during the 1970s ...