- Ryan Reynolds - Hal Jordan / Green Lantern
- Blake Lively - Carol Ferris / Star Sapphire
- Mark Strong - Thaal Sinestro
- Faran Tahir - John Oakes / Tattooed Man
After the events of Green Lantern, Sinestro has been roaming around the galaxy keeping peace, using his secret yellow ring. The power goes to his head and when Sinestro's dirty little secret is revealed, he wages war against the Green Lantern Corps... but with what army? He transforms Hal Jordans ex-girlfriend, Carol Ferris, into the Star Sapphire, a female villain from beyond the cosmos. When Star Sapphire isn't enough, he finds a terrorist covered in tattoos, John Oakes, and gives him the power to bring his tattoos to life and use them to destroy things. Now the Sinestro Corps is ready for war!