Alex Kersting as Butter

Mira Sorvino as Marian

Annabeth Gish as Doctor Jennice

Mykelti Williamson as Professor Dunn

Brian Van Holt as Frank

McKaley Miller as Anna McGinn

Ravi Patel as Doctor Bean

Jack Griffo as Parker

Monte Markham as Dr. Kaufman

Natalie Valerin as Jeanie

John Kassir as Billy

Jake Austin Walker as Jeremy

Olivia Baptista as Nurse Christina

Adain Bradley as Trent

Rachael Wotherspoon as Sarah the Waitress

Jessie Rabideau as Penelope

Danielle Langlois as Aunt Cindy

Taj Speights as Nate

Matthew Gold as Tucker Smith

Frank Krueger as Uncle Luis

Walker Barnes as Brian

Kyle Collin as Todd

Amanda Serra as Lisa

Conlan Joel Harveson as Young Butter