Mobile Suit Gundam 00 (機動戦士ガンダム00 （ダブルオー）, Kidō Senshi Gandamu Daburu Ō?) is the seventh incarnation of Sunrise's long-running Gundam franchise.

It is directed by Seiji Mizushima and written by Yōsuke Kuroda, and features character designs by Yun Kōga. The twenty-five episode series was officially announced by Sunrise during a 15-second trailer on June 2, 2007. The series aired on the Mainichi Broadcasting System and Tokyo Broadcasting System from October 5, 2007 to March 29, 2008. On July 13, 2008, a trailer announcing a second twenty-five episode series was aired. The second series began on October 5, 2008 and concluded on March 29, 2009. A movie sequel is planned for the year 2010.

Mobile Suit Gundam 00 is the first Gundam series to be animated in widescreen and in high-definition, as well as the first to be set in the non-fictional Anno Domini era.

The series is set in a futuristic Earth and centered around Celestial Being, a private paramilitary force and their efforts to rid the world of war and conflict with a series of unique and highly effective mobile suits known as "Gundams".