The star-studded cast of Guy Ritchie’s crime drama MobLand is adding another notable name.

Janet McTeer will be part of the Paramount+ series, which is set to premiere March 30. The Emmy and two-time Oscar nominee joins an ensemble led be Tom Hardy, Pierce Brosnan and Helen Mirren.

MobLand centers on a London-based Irish crime family headed by Brosnan’s Conrad Harrigan, that’s fighting for power within a global syndicate. Mirren plays his wife, Maeve — “the brains behind the charm,” as Brosnan’s character describes her in the series trailer — and Hardy plays Harry Da Souza, the family’s fixer.

McTeer (The Old Man, The Menu) will play a character named Kat, who is “as charming as she is violent,” according to the character’s description. “Crime bosses from London to Beijing are anxious never to cross swords with her.”

The MobLand cast also features Paddy Considine, Joanne Froggatt,...