Phineas and Ferb the Movie: Across the 2nd Dimension

Phineas and Ferb the Movie: Across the 2nd Dimension is a 2011 Disney Channel Original Movie based on the TV series Phineas and Ferb. The film premiered 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 movie 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 fourth animated Disney Channel Original Movie, following Kim Possible Movie: So the Drama, The Proud Family Movie and Leroy & Stitch.

The film premiere averaged 7.6 million viewers, making it one of the highest-rated animated programs on cable in more than three years. It later gained over 3 million viewers to become the second best animated basic cable telecast ever in kids 6 – 11 and tweens 9–14 and cable's fifth best movie ever in total viewers.