https://www.thewrap.com/sabrina-riverdale-crossover-kiernan-shipka/

“Yeah! If they want me, I’ll be there,” Shipka tells The Wrap following the series finale. “Literally, they have my number. They know where I live. I would do anything for Roberto (Aguirre-Sacasa) and I love the guys over on Riverdale, so I think that would be super fun. At least for an episode! Just bop over, right? Just say, hey.”