Ella Purnell returns as serial killer Rhiannon in Sweetpea Season 2. Sky and Starz reveal new trailer, cast additions, and November 26 release date.
Wallflower-turned-serial killer Rhiannon Lewis is officially back for more blood. Broadcasters Sky and Starz dropped the official full trailer and new promotional images for Sweetpea Season 2 on October 29, 2026, confirming that the dark comedy thriller will premiere in the UK on November 26, 2026, via Sky Atlantic and NOW, followed by a US debut in early 2027. Fresh off her acclaimed lead role in Prime Video's Fallout, Ella Purnell reprises her role as the vengeful antihero while stepping up as executive producer for the six-part continuation.
What Is the Plot of Sweetpea Season 2?
Picking up directly after the explosive finale of the first season, Rhiannon Lewis finds her chaotic secret life becoming even more dangerous.
- Promotions and New Enemies: Now promoted at the Carnsham Gazette, Rhiannon must manage her escalating corporate career alongside her growing kill list.
- The Copycat Threat: The primary engine for the second season introduces a copycat killer operating in Carnsham who threatens to expose Rhiannon's past crimes to the police.
- Identity and Internal Crisis: Plagued by memory ghosts of her ex-boyfriend AJ, Rhiannon struggles with her escalating body count, forcing her to confront whether AJ was right when he branded her a monster.
Who Is Joining the Cast of Sweetpea Season 2?
The second season expands its ensemble roster with both high-profile newcomers and returning fan favorites.
- Fresh Romances and Bosses: Rish Shah (Overcompensating) joins as Gabriel, Rhiannon's new romantic interest, while Taj Atwal (Riot Women) plays Freya, her formidable new boss at the newspaper.
- Relentless Investigations: Tamsin Greig (Friday Night Dinner) steps into the cast as Liv, AJ's grieving mother who suspects foul play in her son's disappearance. Jenny Walser (Heartstopper) joins as Rhiannon's naive new friend Daisy.
- Returning Roster: Core season one stars return including Jon Pointing as Craig, Jeremy Swift as Norman, Leah Harvey as Detective Marina, Ingrid Oliver as DI St John, Nitin Ganatra as Rory, and Alexandra Dowling as Seren.
Produced by See-Saw Films (Heartstopper, Slow Horses), Sweetpea Season 2 arrives on Sky and NOW on November 26, 2026.