If you missed it in the theater, have no fear as the dvd will be here.

Jan 13th marks Fox Home Entertainments release on DVD.
Here is the official specs:

The DVD release features the theatrical R-Rated version of the film presented in widescreen format (2.40:1aspect ratio) with English 5.1 Dolby Digital Sound and Spanish/French DolbySurround with English and Spanish subtitles.

Bonus features include:

- Extended Unrated cut of the film
- Reflections: The Making of Mirrors featurette
- Behind The Mirror featurette
- Deleted Scenes (with optional commentary by director Alexandre Aja)
- Inside The Mirror Alternate Ending