The staff and cast of the live-action Ouran High School Host Club television series announced on Thursday that a film adaptation has been green-lit for release next March. The announcement was made during the Tokyo "Summer Party" fan event for the television series, which adapts Bisco Hatori's romantic comedy manga of the same name. Sony Pictures Entertainment will distribute this film, its first television-to-film project.

In the story, high school freshman Haruhi Fujioka pretends to be a boy so that she can take part in the wealthy school's Host Club, to which she owes a large debt. 16-year-old actress Haruna Kawaguchi (Yankee-kun to Megane-chan, Moshidora) will reprise her lead role as Haruhi; it will be the first time that she headlines a feature film. Kawaguchi said that the film will depict an aspect of the story not seen in the live-action television series.

Yusuke Yamamoto and Shunsuke Daito will return as the host club's president Tamaki Suou and vice-president Kyoya Ootori, respectively.

The manga launched in LaLa in August of 2003, and Viz Media launched its North American release in July of 2005. The manga ended in Japan last September, and Viz is publishing the 17th of 18 compiled book volumes in December. The live-action television series premiered last month.

In April 2006, a 26-episode anime began in Japan with Maaya Sakamoto as Haruhi and Mamoru Miyano as Tamaki. Funimation released the anime in North America in 2008.