The beloved actress will feature prominently as the controversial UK Prime Minister in the royal drama’s upcoming fourth season, which will focus on her relationship with Queen Elizabeth II (Olivia Colman).
Anderson is best known for her iconic role as Dana Scully in The X Files, which ran from 1993 until 2002, before being revived for 10th and 11th seasons in 2016 and 2018.
The Emmy Award-winning actress has also received critical acclaim for her starring role in Netflix’s original series, Sex Education, as the lead character’s sex therapist mother.
The streaming service also shared images of up-and-coming star Emma Corrin as Princess Diana, as well as Colman as the Queen and Helena Bonham Carter as Princess Margaret.