Danny Pudi as Jeff Penaras

Mark Feuerstein as Dr. Cooper

Maiara Walsh as Taylor Small

Emily C. Chang as Sarah Penaras

Maya Stojan as Dr. Young

Brian Thomas Smith as Dr. Palmer

Andree Vermeulen as Marie

Kayla DiVenere as Kendra

Landon Ashworth as Zeke

Eddie Alfano as Don Small

Kristin Slaysman as Reporter

Harvey B. Jackson as Officer Hughes

Luca Malacrino as Cicero

Leah Kilpatrick as Female Millennial Lana

Allan Fisher as Citizen

Aria Rose as Fiona (age 17)

Brian Patrick Butler as Lamaze Parent

Kelly Kula as Buff It Out Model

Michael Otis as Car Salesman

Harrison Taylor as Sink Peeing Kid

Grady Hobbs as Screaming Kid

Nathaniel Taylor as Lego Boy

Ansel Cotter as Hiker Son

Carter Lu as Jeff & Sarah's Twin

Duke Lu as Jeff & Sarah's Twin

Evie Chung as Baby Tim / Baby Fiona

Royce Hazelton as Tim Age 3

Shane Cabellon as Tim Age 8

Declan Wilder Ney as Actress-Mom's Son

Matthew Last as Ruckus Kid (uncredited)