Matt Damon and Jessica Chastain at an event for The Martian (2015)

Jessica Chastain at an event for The Martian (2015)

Chiwetel Ejiofor at an event for The Martian (2015)

Matt Damon at an event for The Martian (2015)

Sean Bean at an event for The Martian (2015)

Sean Bean, Matt Damon, Ridley Scott, Kate Mara, and Andy Weir at an event for The Martian (2015)

Sebastian Stan at an event for The Martian (2015)

Jeff Daniels at an event for The Martian (2015)

Kate Mara at an event for The Martian (2015)

Kate Mara and Jessica Chastain at an event for The Martian (2015)

Matt Damon, Kate Mara, and Jessica Chastain at an event for The Martian (2015)

Chiwetel Ejiofor and Kristen Wiig in The Martian (2015)

Chiwetel Ejiofor and Donald Glover in The Martian (2015)

Aksel Hennie and Sebastian Stan in The Martian (2015)

Matt Damon and Ridley Scott in The Martian (2015)

Kristen Wiig at an event for The Martian (2015)

Matt Damon and Ridley Scott at an event for The Martian (2015)

Neil deGrasse Tyson at an event for The Martian (2015)

Matt Damon, Aksel Hennie, Kate Mara, Jessica Chastain, and Sebastian Stan in The Martian (2015)

Chiwetel Ejiofor, Mackenzie Davis, and Csilla Bedi in The Martian (2015)

Matt Damon, Aksel Hennie, Kate Mara, Michael Peña, Jessica Chastain, and Sebastian Stan in The Martian (2015)