Emma Roberts Rex Simpson, Executive Producer
Gabrielle Union Pam Proctor
Tom Hopper Logan O'Leary
Dave Foley Rudolph Bolton
Desi Lydic Dr. Stacy Kellogg
Poppy Liu Nadine Cai
Sam Robards Rex's Dad (Calvin Simpson)
Drew Powell Drunk Customer (Lucas)
Yasha Jackson Grace Jackson
Kuhoo Verma Violet Marie Vislawski
John Debney Original Music Composer
Max Jenkins Miles the Med Tech
Joshua Harto Captain Elvis Popowski
Kevin Downes Security Guard
Sebastián Yatra Toddrick Spencer
Alexis Suarez Flight Captain
Tómas Matos Johnny
Greg Silverman Producer
Liz W. Garcia Director, Executive Producer, Writer
Andrew Call Captain Jack Mancini
Michael J. Massimino Astronaut #1
Troy Iwata Hector Kaneko
Makia Martin Condemned Mansion Tourist
Merritt Janson Departing Ascan
Shirley Roeca Dee Bellevue
John Inwood Director of Photography
Natasha Warner Rex's Mom (Tara Simpson)
Alli Brown Paris
Jon Berg Producer
Glo Tavarez Kendra
Michael Tadross Executive Producer
Eddie A. Bryant Head of Security
Aleksandra Stojanović Foley Artist
Lori Kephart Production Assistant
Allegra Heart Erin
Jaynalie Rios Space Camp Girl #3
Neal Davidson Cold Water Dude
Fergie L. Philippe Bingo
Josephine Huang Miriam Osprey
Abby Harrison Apprentice Sound Editor
Marc J. Wheeler Assistant Art Director
Chris Bosco Executive Producer
Kimberly Pauley Guidance Counselor
Caroline Concannon Rex Simpson - 8 years old
Gideon Yu Executive Producer, Astronaut #2
August Garcia-Harto Tourist Kid #2
Cooper Silverman Beach Partygoer
John Ahlin Gator Greg
Wilder Garcia-Harto Tourist Kid #1
Alyson Schacherer Tourist Mom
Les Ware Astronaut #3
Hailey Gaudenti Assistant Accountant
Samira Sardella Space Camp Girl #1
Ollie Gregorio Space Camp Girl #2
Brennan Joseph Taylor Sweaty Ascan