Ingrid becomes obsessed with a social network star named Taylor Sloane who seemingly has a perfect life. But when Ingrid decides to drop everything and move west to be Taylor's friend, her behaviour turns unsettling and dangerous.
| Actor | Role |
|---|---|
 Aubrey PlazaIngrid Thorburn | Ingrid Thorburn |
 Elizabeth OlsenTaylor Sloane | Taylor Sloane |
 O'Shea Jackson Jr.Dan Pinto | Dan Pinto |
 Wyatt RussellEzra O'Keefe | Ezra O'Keefe |
 Billy MagnussenNicky Sloane | Nicky Sloane |
 Pom KlementieffHarley Chung | Harley Chung |
 Hannah Pearl UttNicole | Nicole |
| JJoseph BreenGarth Lafayette | Garth Lafayette |
 Angelica AmorCindy | Cindy |
 Meredith HagnerCharlotte | Charlotte |
 Charlie WrightChuck | Chuck |
| DDennis AtlasBuck | Buck |
 Malika WilliamsNurse | Nurse |
| LLuis DevezeMechanic | Mechanic |
| JJay Speedy WeingartenWaiter | Waiter |
 Martin GarciaMail Man | Mail Man |
 Brandon JohnsonBouncer | Bouncer |
 Vincent van HinteCashier | Cashier |
 Destiny SoriaCowgirl (uncredited) | Cowgirl (uncredited) |
 Aidan WallaceLogan (uncredited) | Logan (uncredited) |
| TTina LorraineTherapist (uncredited) | Therapist (uncredited) |
| MMegan GriffeyBar Patron (uncredited) | Bar Patron (uncredited) |
| AAndrew HorschakBar Patron (uncredited) | Bar Patron (uncredited) |
| JJana RitterDancing Woman (uncredited) | Dancing Woman (uncredited) |