Everyone’s favorite quiet wallflower-turned-serial-killer is officially back to expand her kill list. Following a highly acclaimed, darkly comedic first season in late 2024, Sky Studios and Starz wasted no time locking in Rhiannon Lewis’ next “coming-of-rage” chapter.
As of May 2026, Sky has officially released the first-look images, the principal cast has finished their blood-soaked shoots, and the upcoming season promises to be completely “bonkers.”
Sweetpea Season 2: Release Date Buzz
While premium networks love to keep the exact calendar date under wraps until the final trailer, the timeline for Season 2 is finally locked in.
- Official Status: Post-Production / Coming in 2026.
- The Timeline: Lead star and executive producer Ella Purnell confirmed that filming for Season 2 officially wrapped back in November 2025.
- Projected Premiere Window: Fall 2026. Sky formally confirmed in March and May 2026 press updates that the series is a core pillar of its 2026 broadcasting slate. Given that Season 1 thrived in an October spooky-season slot, a parallel autumn rollout on Sky (UK) and Starz (US) is heavily anticipated.
Sweetpea Season 2: Cast News
The second season is introducing a brilliant roster of newcomers to complicate Rhiannon’s double life, alongside some massive casting shake-ups.
The Big New Additions
- Rish Shah as Gabriel: The Overcompensating and Ms. Marvel actor joins the main cast as Gabriel, Rhiannon’s irresistibly charming new “rebound” romantic interest.
- Tamsin Greig as Liv: In a massive casting coup, the British comedy icon (Friday Night Dinner, Green Wing) has signed on to play Liv—the mother of the late, unfortunate AJ. Her arrival spells massive danger for Rhiannon.
- Taj Atwal as Freya: Taking over the newsroom, Atwal steps in as Rhiannon’s formidable, sharp-tongued new boss at the Carnsham Gazette.
- Jenny Walser as Daisy: The Heartstopper alum plays Daisy, a sweet, painfully adoring new friend who seamlessly inserts herself into Rhiannon’s orbit.
The Returning Survivors
- Ella Purnell as Rhiannon Lewis
- Leah Harvey as Marina (the relentless junior detective still hot on the trail)
- Jon Pointing as Craig
- Jeremy Swift as Norman
- Ingrid Oliver as DI Diana St. John
- Alexandra Dowling as Seren (Rhiannon’s sister)
- Nitin Ganatra as Marcus
Sweetpea Season 2: Plot Details
Season 1 left Rhiannon in a dizzying psychological space. She finally found her voice, harnessed her violent rage, and completely shifted the power dynamics of her mundane life—but it cost her the life of AJ, the one person who truly saw her.
According to the official Sky Studios Season 2 synopsis, Rhiannon’s messy world is going to get significantly tighter:
“Navigating a new promotion, an irresistible rebound, Marina still hot on her trail, her sister selling her family home and a copycat killer threatening to expose her, the kill list is mounting. But now that she’s harnessed her rage and found her power, Rhiannon is forced to question whether her perfect ex, AJ, was right: is she a monster?”
Key narrative predictions and expectations include:
- The Copycat Threat: The arrival of a copycat killer in Carnsham flips the script entirely. Rhiannon went from being completely invisible to having her dark, private work emulated. This copycat threat will force her into a twisted game of cat-and-mouse to protect her identity before the police tie the copycat’s messy crimes back to her clean slates.
- AJ’s Mother is Watching: Tamsin Greig’s character, Liv, isn’t just visiting; she is a grieving mother looking for answers. Walking around Carnsham asking intrusive questions about her son’s final days puts an immense psychological squeeze on Rhiannon, who must play the comforting friend while hiding the blood on her hands.
- A Scale of Morality: Executive producers have teased that Season 2 moves away from simple vengeance. Now that the immediate triggers of her father’s death and her childhood bullies have been dealt with, the story will center on the long-term consequences of her actions. Rhiannon will face an intense internal battle regarding her own morality—grappling with whether she is a justified vigilante or just a cold, irredeemable monster.
- From the Star: “We are back in full swing for Season 2… with what promises to be an intoxicating ride for Rhiannon as she continues on her murderous journey. This season, the stakes are even higher.” — Ella Purnell.
You can currently stream all 6 episodes of Sweetpea Season 1 on Sky/NOW in the UK and Starz in the US to see where the rage began before the copycats arrive this Fall.