Spike Jonze Alien Child Director, Actor, Screenwriter, Producer Joaquin Phoenix Theodore Actor Amy Adams Amy Actor Scarlett Johansson Samantha Voice Rooney Mara Catherine Actor Chris Pratt Paul Actor Olivia Wilde Blind Date Actor Matt Letscher Charles Actor Kristen Wiig SexyKitten Actor Portia Doubleday Surrogate Date Isabella Actor Soko Voice of Isabella Voice Brian Cox Alan Watts Voice Megan Ellison Producer Vincent Landay Producer Daniel Lupi Executive Producer Natalie Farrey Executive Producer Chelsea Barnard Executive Producer Hoyte Van Hoytema Cinematographer Eric Zumbrunnen Film Editing Jeff Buchanan Film Editing K.K. Barrett Production Design Casey Storm Costume Design Arcade Fire Original Music Owen Pallett Original Music Ellen Lewis Casting Austin Gorg Art Director Gene Serdena Set Decoration Cassandra Kulukundis Casting