G.J. Echternkamp tells the story of his relationship with his parents, his mother Cindy and his step-father, Frank. Frank used to be a member of OXO, a band from the '80s whose one hit wonder scored with the song "Whirly Girl". Cindy was the ultimate groupie who married Frank and thought life would be glamorous and award shows, but it's not how it turned out.
| Actor | Role |
|---|---|
 Rene RussoCindy Brown | Cindy Brown |
 Oliver PlattFrank Garcia | Frank Garcia |
 Johnny SimmonsGJ Echternkamp | GJ Echternkamp |
 Jane LevyKate | Kate |
 Marc MaronGilbert | Gilbert |
| RRon MylesNot listed | Not listed |
| JJessica GarrisonLizzie | Lizzie |
 Fabianne ThereseMelissa | Melissa |
 Claire TitelmanClaire | Claire |
| NNicholas LoiacanoBilly Smeer | Billy Smeer |
| JJoseph OliveiraDrunk Man at Bar | Drunk Man at Bar |
| MMatthew TilleySuperfan Matt | Superfan Matt |