- Tommy Wiseau as Johnny, a successful banker who is engaged to Lisa
- Juliette Danielle as Lisa, Johnny's fiancée who engages in an affair with Mark
- Greg Sestero as Mark, Johnny's best friend who is having an affair with Lisa
- Philip Haldiman as Denny, a young college student who is financially and emotionally supported by Johnny
- Carolyn Minnott as Claudette, Lisa's mother.
- Robyn Paris as Michelle, Lisa's best friend and confidante
- Scott Holmes as Mike, Michelle's boyfriend.
- Dan Janjigian as Chris-R, a drug dealer who threatens Denny
- Kyle Vogt as Peter, a psychologist and friend of Mark and Johnny
- Greg Ellery as Steven, a friend of Johnny and Lisa
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