Kathryn Hahn and Janelle Monáe Join the Cast of 'Knives Out 2' ETOnline 2 hrs ago Kathryn Hahn's knives were out all along. ET can confirm that fresh off of WandaVision, the actress is the latest star to join the cast of writer-director Rian Johnson's Topping an ensemble cast comprised of Ana de Armas, Chris Evans, Jamie Lee Curtis, Toni Collette, Christopher Plummer, Michael Shannon and LaKeith Stanfield is no easy feat. But if you're going to attempt it, you get Kathryn Hahn and Janelle Monáe. Character and plot details are currently being kept under wraps, but Monáe reacted to her casting on social media, appropriately, with a series of knife emojis.