The Hobbit: The Desolation of Smaug is now available on iTunes, ahead of its release on DVD and Blu Ray.

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Additional bonus features on the iTunes edition include Peter Jackson Invites You to the Set and New Zealand: Home of Middle Earth: Part 2.

A Hobbit-themed Lego set will come free of charge with the blu-ray of The Hobbit: Desolation of Smaug.

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The Lego set will be launched with this promotional package, which will be available at over 600 Sainsbury's locations starting April 7. It will be also be available for purchase online via the Sainsbury website. The package would cost £12.99 in total.

A special collector's edition of the DVD and Blu-ray for The Hobbit: Desolation of Smaug is also scheduled to release on April 8.

The film will be available in a variety of packages which will also feature a limited collector's edition set for $105.43, a Blu-ray 3-D combo pack for $44.95, a Blu-ray combo pack for $35.99 and a 2-disc DVD special edition for $28.98. 

Only 25,000 pieces of the collector's edition will be available in the U.S. and will include two Gates of Erebor replica bookends and a theatrical version of the film in 3-D high-definition, high-definition and standard definition.

Watch the trailer for The Hobbit: The Desolation of Smaug here: