Redbox Instant is offering a free rental of The Hobbit: An Unexpected Journey -- but only on May 22 -- after fans unlocked the freebie in a tweet-to-stream promotion.
People who rent the movie before the clock strikes 12 a.m. ET on May 23 will have the movie in their Redbox Instant library for 30 days. A few more caveats: "Once you start watching it, you have 48 hours to view the movie as many times and on as many supported registered devices as you choose," the promotion's disclaimer reads.
Users must have Redbox Instant account (no subscription needed) to redeem the offer.
Redbox kept participants of the #RedboxInstantGimme tweet-to-stream challenge in the loop as to whether the movie would be unlocked.
Redbox says similar movie offers will come in the future.
Peter Jackson's flick -- starring Elijah Wood, Richard Armitage and Ian Mckellen -- became available on Blu-ray and DVD in December. Here's the movie's trailer: