STARZ released a sneak peek at Sweetpea, where Ella Purnell plays a wallflower who blossoms when she starts killing people she hates.

Fallout' star Ella Purnell discusses how she became a producer for the Sky/Starz serial killer comedy 'Sweetpea' and developing her character.

But Sweetpea protagonist Rhiannon Lewis, played by none other than Yellowjackets alum Ella Purnell, might be a rare exception. Maybe then, she would have had the chance to confront her teenage angst head-on,