Warner Bros. is set to premiere the trailer for Green Lantern on the big-screen in front of Harry Potter and the Deathly Hallows: Part I at theaters later this week, and Entertainment Tonight will be showing their first look at the film tomorrow.

We’ll bring you the trailer right here on SciFiMafia.com as soon as we get it! Until then, check out ET’s preview that shows of some footage of Ryan Reynolds as Hal Jordan/Green Lantern, Blake Lively as Carol Ferris, Taika Waititi as Thomas Kalmaku, Peter Sarsgaard as Hector Hammond, along with quick looks at Oa and Kilowog.

Let us know what you think in the comments!

Green Lantern: ET Preview

Green Lantern, directed by Martin Campbell and starring Ryan Reynolds, Blake Lively, Peter Sarsgaard, Mark Strong, Temuera Morrison, Jenna Craig, Jon Tenney and Tim Robbins is slated to hit theaters on June 17th, 2011.