Sadie Sink as Natalie Adams
the quiet one

.....

Kate Walsh as Elizabeth Adams
the always drunk one

.....

Matt LeBlanc as Thomas Adams
the no good father

.....

Michael Douglas as  Robert Adams
the best person in the entire world

.....

Julie Andrews as Florence Adams
the grandmother of the year

....

Dennis Quaid as Charles Adams
the fun uncle that everyone loves

.....

Montana Jordan as Georgie Cooper
the slightly immature one

.....

Lance Barber as George Sr. Cooper
the beer drinker

.....

Zoe Perry as Mary Cooper
the overly religious one

.....

Annie Potts as Constance 'Connie' Cooper
the honorary grandmother

.....

Raegan Revord as Missy Cooper
the little sister figure

.....

Ian Armitage as Sheldon Cooper
the highly annoying genius kid