WandaVision: Elizabeth Olsen Initially Thought Evan Peter's Casting Meant X-Men Universe Was Merging Into MCU ✖ WandaVision's series finale left some Marvel Cinematic Universe disappointed, but the one reveal that caused the most controversy was no doubt Evan Peters Quicksilver. As it turns out, "Uncle Pete" was Avengers films and Fox's X-Men movies could co-exist. Instead, Evan Peter's Quicksilver was revealed to be "Ralph Bohner" a local actor that evil witch Agatha Harkness (Kathryn Hahn) enchanted into being her spy/servant. However, it turns out that Evan Peters' casting as Quicksilver even fooled WandaVision star Elizabeth Olsen into thinking the Marvel Cinematic Multiverse was happening!