Karima McAdams – Kassia
Kassia is a nun and abbess in Constantinople. Appearing to already be of noble birth, Kassia was raised in a wealthy family and grew up to be exceptionally beautiful and intelligent.
Though she entered a commitment of being celibate as a nun, she still develops a secret affair with Amir Ziyadat Allah.
Jonathan Rhys Meyers - Bishop Heahmund
Bishop Heahmund is a Bishop Warrior and Saxon Bishop of Sherborne. He was first introduced in Season 1, appearing to comfort Widow Ordlaf of her husband’s death.
What complicates his character is that despite being a true follower of Christianity and God, he still coaxes Widow Ordlaf into brutal sex with him. He also engages in alcohol consumption and, obviously being a Warrior, participates in battles.
Jonathan Rhys Meyers - Bishop Heahmund
Jonathan Rhys Meyers is an Irish actor, well known for his roles in films that include Velvet Goldmine, Match Point, Bend It Like Beckham, and Mission: Impossible III. He also appeared on television as Elvis Presley in the miniseries Elvis.
His performance on the series actually earned him a Golden Globe Award for Best Actor - Miniseries or Television Film. His dashing looks also brought him to be the face model for a number of Hugo Boss fragrances campaigns.
Karima McAdams - Kassia
Karima Adebibe, or more famously known as Karima McAdams, is a Moroccan-English actress and fashion model. Though she was born in England, she actually started her modeling career growing up in Morocco. This paved the way for her to be selected as one of the models for Lara Croft in the widely renowned video game series, Tomb Raider.
Aside from her appearance on Vikings, Karima is also most recently seen in the shows, Fearless and Deep State.
Cathy White - Ealhswith
Ealhswith is the mother of Judith, Ecgberht, and Bjaela, and wife of King Aelle.
She is first introduced on the show in Season 1, accompanying King Aelle and Acgberht in welcoming Aethelwulf, Aelle’s brother who eventually is given the responsibility of leading King Aelle’s army against the Northmen.