David Corenswet and Ben Platt

"He gets to be rageful and self-serving but also pathetic and tender," says star Ben Platt of his character, Payton, pictured with David Corenswet's River. "And he gets to explore the relationship with his mother, with his friends and with romantic partners, so he's a very fully formed guy — which I don't think I've ever gotten to [play] on camera before."