Ryan Reynolds character Hal Jordan / Green Lantern
Blake Lively character Carol Ferris
Peter Sarsgaard character Hector Hammond
Tim Robbins character Senator Hammond
Mark Strong character Sinestro
Temuera Morrison character Abin Sur
Jenna Craig character Carol Ferris at 11
Jon Tenney character Martin Jordan
Mike Doyle character Jack Jordan
NicK Jandl character Jim Jordan
Dylan James character Jason Jordan
Leanne Cochran character Janice Jordan
Angela Bassett character Dr. Amanda Waller
Taika Waititi character Tom Kalmaku
Michael Clarke Duncan character Kilowog (voice)
Geoffrey Rush character Tomar-Re (voice)
Clancy Brown character Parallax (voice)
Deke Anderson character Four Star General Caven
Gattlin Griffith character Young Hal
Tiffany Morgan character Mom
Amy Carlson character Jessica Jordan
Laura Cayouette character Party Guest #1
Bobby Holland Hanton character Security Guard
Silas Cooper character Avionics Tech #2
Jay O. Sanders character Carl Ferris
Jeff Wolfe character Bob Banks
Dorian Kingi character Tomar-Re (uncredited)