For a while it’s diverting to match these avatars with their real-life counterparts, some of whom pop up for a scene or two, like Mark’s caretaker (a Russian-accented Gwendoline Christie), his physical therapist (Janelle Monáe) and his favorite porn star (Leslie Zemeckis — yes, the director’s wife). More lasting impressions are made by Roberta (a lovely Merritt Wever, giving the movie’s best performance), who runs a local toy shop, and also by a new neighbor, Nicol (Leslie Mann), who captivates Mark and immediately enters his doll rotation.
Source: L.A. Times – Entertainment News