as Perry the Platypus; Caroline Rhea as Linda Flynn-Fletcher, Phineas and Candace's mother and stepmother to Ferb; Richard O'Brien as Lawrence Fletcher, Ferb's father and Phineas and Candace's stepfather; Jack McBrayer as Irving, who admires Phineas and Ferb, and is the creator of the Phineas and Ferb fansite; Kelly Hu as Candace's best friend Stacy; Povenmire as Dr. Doofenshmirtz; Marsh as Major Monogram; Olivia Olson as Dr. Doofenshmirtz's daughter Vanessa; Tyler Mann as Carl, Major Monogram's goofy super genius intern; Alyson Stoner as neighbor Isabella Garcia-Shapiro, a sweet Mexican/Jewish girl with a crush on Phineas; Mitchel Musso as Jeremy, Candace's crush and later her boyfriend; and Madison Pettis as Adyson Sweetwater, a member of Isabella's Fireside Girls troop. The show's casting organization is responsible for selecting most of the voice actors and actresses, choosing actors such as Martella and Musso for major roles based on perceived popularity with target demographics. Povenmire and Marsh select guest stars, casting people that they "really want to work with." They also solicit guest roles from actors whom they feel would lend an interesting presence to the show. Guest stars have included pop-culture figures such as Damian Lewis, boxer Evander Holyfield, film stars Cloris Leachman and Ben Stiller and pop singer Kelly Clarkson. Povenmire and Marsh have also solicited Tim Curry and Barry Bostwick, stars of The Rocky Horror Picture Show, to make guest appearances, while Rocky Horror creator Richard O'Brien voices Lawrence Fletcher. Top Gear stars Jeremy Clarkson, Richard Hammond and James May guest-starred in a race-car themed episode as commentators. Other guest stars include Tina Fey, Seth MacFarlane, David Mitchell, Jaret Reddick, Clay Aiken, Chaka Khan and Kevin Smith. Reception and achievements Critical response The show has received generally positive reviews. The New York Times commented favorably, describing the show as "Family Guy with an espionage subplot and a big dose of magical realism." It considered the pop-culture references ubiquitous "but [placed] with such skill that it seems smart, not cheap." Whitney Matheson wrote in her USA Today blog Pop Candy that the series was an achievement in children's programming, applauding the writing and calling the show "an animated version of Parker Lewis Can't Lose." Emily Ashby of Common Sense Media praised the show's humor and plot, giving it four out of five stars. The Seattle Times wrote that the story of the show was "valiant" and that the main characters are "young