Danny Pudi
— Jeff Penaras
Mark Feuerstein
— Dr. Cooper
Maiara Walsh
— Taylor Small
Emily C. Chang
— Sarah Penaras
Maya Stojan
— Dr. Young
Brian Thomas Smith
— Dr. Palmer
Andree Vermeulen
— Marie
Kayla DiVenere
— Kendra
Landon Ashworth
— Zeke
Eddie Alfano
— Don Small
Kristin Slaysman
— Reporter
Harvey B. Jackson
— Officer Hughes
Luca Malacrino
— Cicero
Leah Kilpatrick
— Female Millennial Lana
Allan Fisher
— Citizen
Aria Rose
— Fiona (age 17)
Kelly Kula
— Buff It Out Model
Michael Otis
— Car Salesman
Harrison Taylor
— Sink Peeing Kid
Grady Hobbs
— Screaming Kid
Nathaniel Taylor
— Lego Boy
Ansel Cotter
— Hiker Son
Carter Lu
— Jeff & Sarah's Twin
Duke Lu
— Jeff & Sarah's Twin
Evie Chung
— Baby Tim / Baby Fiona
Royce Hazelton
— Tim Age 3
Shane Cabellon
— Tim Age 8
Declan Wilder Ney
— Actress-Mom's Son
Matthew Last
— Ruckus Kid (uncredited)
Kirk Zipfel
— Brad