Diane A. Delano (born January 29, 1957), sometimes credited as Diana Delano, is an American character actress who voiced Ophelia Ogelvy in the Disney Channel animated series American Dragon: Jake Long, and played Coach Penny in the Disney Channel sitcom Wizards of Waverly Place, Mad Dog in Good Luck Charlie, Regina Honey in K.C. Undercover, Donna in Desperate Housewives, Mo in According to Jim, Mountain Girl in The Ladykillers, Roberta 'Bobbi' Glass and Jessi Glass in Popular.