It was never clear what the connection between Peggy Carter and Sharon Carter. Steve Rogers aka Captain America played by Chris Evans was romantically involved with both women. Hayley Atwell was there first. The Englishwoman performed as Peggy Carter with her British accent intact. Peggy Carter was the girlfriend role in Captain America: The First Avenger and she was left behind when Captain America was frozen in a block of ice in 1943. Captain America was released from his block of ice seventy years later in the year 2013. Peggy Carter has her own television series entitled Agent Carter starring Hayley Atwell. As far as I know, Agent Carter has been renewed for a second season.