Rebecca Louisa Ferguson Sundström (born 19 October 1983) is a Swedish actress. She began her acting career with the Swedish soap opera Nya tider (1999–2000) and went on to star in the slasher film Drowning Ghost (2004). She came to international prominence with her portrayal of Elizabeth Woodville in the British television miniseries The White Queen (2013), for which she was nominated for a Golden Globe for Best Actress in a Miniseries or Television Film.
Ferguson starred as MI6 agent Ilsa Faust in the action spy films Mission: Impossible – Rogue Nation (2015) and its sequel Mission: Impossible – Fallout (2018). She played Jenny Lind in the musical The Greatest Showman (2017), and also had supporting parts in the comedy-drama Florence Foster Jenkins (2016) and the thriller The Girl on the Train (2016).