* Ryan Reynolds as Hal Jordan / Green Lantern
* Blake Lively as Carol Ferris
* Peter Sarsgaard as Hector Hammond
* Mark Strong as Sinestro
* Angela Bassett as Amanda Waller
* Tim Robbins as Senator Robert Hammond
* Taika Waititi as Thomas Kalmaku
* Geoffrey Rush as Tomar-Re
* Clancy Brown as Parallax
* Jay O. Sanders as Carl Ferris
* Jon Tenney as Martin Jordan
* Temuera Morrison as Abin Sur
* Michael Clarke Duncan as Kilowog
* Jason Clarke as Hal Jordan's father
* Glen Davis as Hal Jordan's brother