Phineas and Ferb the Movie: Across the 2nd Dimension is a 2011 American animated science fantasy action-adventure television film based on the American animated TV series Phineas and Ferb. The film premiered on August 5, 2011 in the United States. It was first announced by Jeff "Swampy" Marsh during a January 2010 interview with the Daily Telegraph. The events of the film take place during the third season of Phineas and Ferb. It is the first feature-length film of the Phineas and Ferb series, and the third animated Disney Channel Original Movie, following Kim Possible Movie: So the Drama and The Proud Family Movie.