Phineas and Ferb the Movie: Across the 2nd Dimension is a 2011 American animated science fantasy action-adventure comedy-drama 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.