Brittany Runs a Marathon Cast
The cast of Brittany Runs a Marathon.
Jillian Bell
as Brittany Forgler

Jillian Bell portrays the lead character Brittany Forgler, a young woman who transforms her life by taking up running.

Michaela Watkins
as Catherine

Michaela Watkins plays Catherine, Brittany's supportive neighbor and friend who inspires her to start running.

Utkarsh Ambudkar
as Jern Dahn

Utkarsh Ambudkar portrays Jern Dahn, a fun-loving and charismatic running enthusiast who becomes Brittany's running partner.

Lil Rel Howery
as Demetrius

Lil Rel Howery plays Demetrius, Brittany's brother-in-law, who provides her with encouragement and motivation throughout her running journey.

Micah Stock
as Seth

Micah Stock portrays Seth, Brittany's roommate and friend who joins her in training for a marathon.

Alice Lee
as Gretchen

Alice Lee plays Gretchen, one of Brittany's close friends, who supports her in her pursuit of a healthier lifestyle.

Patch Darragh
as Doctor Falloway

Patch Darragh portrays Doctor Falloway, a medical professional who helps Brittany on her path to wellness.

Peter Vack
as Ryan

Peter Vack plays Ryan, a potential love interest who enters Brittany's life and encourages her to embrace her newfound confidence.

Kate Arrington
as CiCi Fogler
Juri Henley-Cohn
as David
Adam Sietz
as Glenn
Mikey Day
as Dev
Max Pava
as Drunk Guy
Jennifer Dundas
as Shannon
Erica Hernandez
as Molly
Dan Bittner
as Terrence
Beth Malone
as Tesla
Nadia Quinn
as Dana
Pascal Yen-Pfister
as Snobby Artist Man
Miriam A. Hyman
as Snobby Artist Woman
Gene Gabriel
as Michael
Gina Costigan
as Drunk Woman
Sarah Bolt
as Jasmine
Ian Unterman
as Matty
Robert Garcia Cabrera
as Waiter
Maia Nkenge Wilson
as Overweight Woman
Frances Eve
as Marathon Worker
Esteban Benito
as Peter
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