The Marshmallow Experiment

The Marshmallow Experiment is an upcoming coming-of-age sex comedy film directed by Richard Goldgewicht. Matt Hamilton and Abe Frank co-wrote as well. It stars Sam McCarthy, Dafne Keen, Steve Buscemi, Johnny Knoxville, Josh Lucas, and Sarah Chalke.

Premise

For Alex, making it through high school as a socially awkward teen is hard enough. Trying to survive while having an insatiable online porn addiction makes it even harder.

Cast

Sam McCarthy as Alex, a sexually frustrated teenager who unplugs from the internet after a disastrous sexual encounter
Dafne Keen as Kat Garcia
Steve Buscemi as King Dong
Johnny Knoxville as Will
Josh Lucas as Dr. Newman
Sarah Chalke as Colleen

Production

In April 2025, it was announced that a coming-of-age sex comedy film written and directed by Richard Goldgewicht, Matt Hamilton, and Abe Frank was in development, with Sam McCarthy, Dafne Keen, Steve Buscemi, Johnny Knoxville, Josh Lucas, and Sarah Chalke joining the cast. Principal photography began on April 28, 2025, in Vancouver, and wrapped on May 22.