It took Creators Dan Povenmire and Jeff "Swampy" Marsh sixteen years to get this show on television.
Phineas and Ferb is the longest-running Disney animated show, lasting from 2007 to 2015, beating Kim Possible (2002) for five years from 2002 to 2007.
Thomas Brodie-Sangster (Ferb Fletcher) recorded his audio in the U.K. and sent it to the U.S. Because Ferb rarely spoke, his voice actor didn't need to live near production.
The first drawing of Phineas was on a piece of butcher's paper, drawn with crayon in a restaurant.
Director and Creator Dan Povenmire, and Director Zac Moncrief left Family Guy (1999) to work on this show.