Joaquin Phoenix Theodore Twombly Scarlett Johansson Samantha (voice) Amy Adams Amy Rooney Mara Catherine Klausen Chris Pratt Paul Olivia Wilde Blind Date Matt Letscher Charles Portia Doubleday Surrogate Date Isabella Spike Jonze Alien Child (voice) Bill Hader Chat Room Friend #2 (voice) Kristen Wiig SexyKitten (voice) Artt Butler Text Voice (voice) SoKo Isabella (voice) Brian Cox Alan Watts (voice) Luka Jones Mark Lewman Sam Jaeger Dr. Johnson Pramod Kumar Pizza Vendor Evelyn Edwards Mother Who Dated Pricks Lil Buck Busker / Dancer Lynn Adrianna Letter Writer #1 Lisa Renee Pitts Letter Writer #2 May Lindstrom Sexy Pregnant TV Star David Azar Theodore's Divorce Attorney Guy Lewis Marriage Counselor Melanie Seacat Nice Lady Steve Zissis New Sweet Boyfriend of Mother Who Dated Pricks Dane White Son James Ozasky Catherine's Dad Samantha Sarakanti Mother of Newborn Gracie Prewitt Jocelyn Claudia Choi Uncomfortable Waitress Joaquin Phoenix Theodore Twombly Scarlett Johansson Samantha (voice) Amy Adams Amy Rooney Mara Catherine Klausen Chris Pratt Paul Olivia Wilde Blind Date Matt Letscher Charles Portia Doubleday Surrogate Date Isabella Spike Jonze Alien Child (voice) Bill Hader Chat Room Friend #2 (voice) Kristen Wiig SexyKitten (voice) Artt Butler Text Voice (voice) SoKo Isabella (voice) Brian Cox Alan Watts (voice) Luka Jones Mark Lewman Sam Jaeger Dr. Johnson Pramod Kumar Pizza Vendor Evelyn Edwards Mother Who Dated Pricks Lil Buck Busker / Dancer Lynn Adrianna Letter Writer #1 Lisa Renee Pitts Letter Writer #2 May Lindstrom Sexy Pregnant TV Star David Azar Theodore's Divorce Attorney Guy Lewis Marriage Counselor Melanie Seacat Nice Lady Steve Zissis New Sweet Boyfriend of Mother Who Dated Pricks Dane White Son James Ozasky Catherine's Dad Samantha Sarakanti Mother of Newborn Gracie Prewitt Jocelyn Claudia Choi Uncomfortable Waitress Laura Kai Chen Tatiana Joaquin Phoenix Theodore Twombly Scarlett Johansson Samantha (voice) Amy Adams Amy Rooney Mara Catherine Klausen Chris Pratt Paul Olivia Wilde Blind Date Matt Letscher Charles Portia Doubleday Surrogate Date Isabella Spike Jonze Alien Child (voice) Bill Hader Chat Room Friend #2 (voice) Kristen Wiig SexyKitten (voice) Artt Butler Text Voice (voice) SoKo Isabella (voice) Brian Cox Alan Watts (voice) Luka Jones Mark Lewman Sam Jaeger Dr. Johnson Pramod Kumar Pizza Vendor Evelyn Edwards Mother Who Dated Pricks Lil Buck Busker / Dancer Lynn Adrianna Letter Writer #1 Lisa Renee Pitts Letter Writer #2 May Lindstrom Sexy Pregnant TV Star David Azar Theodore's Divorce Attorney Guy Lewis Marriage Counselor Melanie Seacat Nice Lady Steve Zissis New Sweet Boyfriend of Mother Who Dated Pricks Dane White Son James Ozasky Catherine's Dad Samantha Sarakanti Mother of Newborn Gracie Prewitt Jocelyn Claudia Choi Uncomfortable Waitress Laura Kai Chen Tatiana Joaquin Phoenix Theodore Twombly Scarlett Johansson Samantha (voice) Amy Adams Amy Rooney Mara Catherine Klausen Chris Pratt Paul Olivia Wilde Blind Date Matt Letscher Charles Portia Doubleday Surrogate Date Isabella Spike Jonze Alien Child (voice) Bill Hader Chat Room Friend #2 (voice) Kristen Wiig SexyKitten (voice) Artt Butler Text Voice (voice) SoKo Isabella (voice) Brian Cox Alan Watts (voice) Luka Jones Mark Lewman Sam Jaeger Dr. Johnson Pramod Kumar Pizza Vendor Evelyn Edwards Mother Who Dated Pricks Lil Buck Busker / Dancer Lynn Adrianna Letter Writer #1 Lisa Renee Pitts Letter Writer #2 May Lindstrom Sexy Pregnant TV Star David Azar Theodore's Divorce Attorney Guy Lewis Marriage Counselor Melanie Seacat Nice Lady Steve Zissis New Sweet Boyfriend of Mother Who Dated Pricks Dane White Son James Ozasky Catherine's Dad Samantha Sarakanti Mother of Newborn Gracie Prewitt Jocelyn Claudia Choi Uncomfortable Waitress Laura Kai Chen Tatiana