By Emily Exton
Updated September 15, 2010 at 10:00 PM EDT

Hey PopWatchers! We’re giving away 7 Lord of the Rings trilogy Blu-ray sets (sorry, no DVDs), courtesy of our corporate siblings over at Warner Home Video.

There has been much speculation (Martin Freeman as Bilbo Baggins?) over casting for the film adaptation of J.R.R. Tolkien’s prequel to the LOTR series, The Hobbit. Be our casting director! Who do you think should take on the roles of Bilbo, Thorin Oakenshield, and Smaug the dragon?

Here’s how to enter to win:

1. Go to our Facebook page.

2. Click “Like” at the top of the page

3. Find the post on our Wall announcing the giveaway, click Comment, and give us your best hypothetical casting for each of The Hobbit‘s key characters. (Note:

Commenting on this post won’t enter you in the giveaway; see the official rules after the jump.)

4. If you’re a winner, we’ll contact you via Facebook message to request your mailing address.

The giveaway starts NOW!