After losing her mom in an accident, a teen and her father welcome a distant cousin named Sienna into their household. Hoping to claim the family as her own, the psychopathic Sienna hatches a devious plan to recreate the prom she never experienced.
| Actor | Role |
|---|---|
 Yvonne ZimaSienna Lawton | Sienna Lawton |
 Mark LutzTony Wilson | Tony Wilson |
 Erica AndersonMaya Wilson | Maya Wilson |
| MManny BendaLuke Wilson | Luke Wilson |
 Kyle MeagherJake Davis | Jake Davis |
| MMegan VincentHannah Wilson | Hannah Wilson |
 Gabriel DarkuTyler McNichol | Tyler McNichol |
| JJasmine AshaViolet | Violet |
| LLorilee HollowayDorothy Lawton | Dorothy Lawton |
 Madelyn KeysKat Merritt | Kat Merritt |
 John AndrewsPolice Officer | Police Officer |
 Brianna BarnesLauren King | Lauren King |
| LL. Fernando Becerra SánchezPolice Officer | Police Officer |
| JJordan BlaisPolice Officer | Police Officer |
 Ronda Louis-JeuneSaleswoman | Saleswoman |
 Heather Tod MitchellJanet Macturn | Janet Macturn |