Dan Povenmire
Daniel Kingsley Povenmire (born March 18, 1963) is an American animator, voice actor, writer, director, and producer. He is best known as the co-creator of the animated television series Phineas and Ferb (2007–2015) with Jeff "Swampy" Marsh, for which he also provided the voice of Dr. Heinz Doofenshmirtz.