Thea White, voice of Muriel in 'Courage the Cowardly Dog,' dead at 81. She died after developing an infection following surgery, he said. White was born in Newark, New Jersey on June 16, 1940. She "was a professional actress most of her life starting on stage professionally in her twenties, was also a librarian, and most recently was a voice-over actor," Zitzner on Facebook. "The family is blown away by her loving friends and fans." Brad Zitzner, White's nephew, also posted a tribute to his aunt, whom he called Feefer, on Facebook on Sunday. "Feefer was the greatest cheerleader to me and my family," he wrote. "I've never met a person who knew you who didn't think you were the greatest person alive," he added. "That lasted even up through your stay in the hospital as I'm told the nurses and doctors also fell in love. "Courage the Cowardly Dog" ran for 52 episodes from 1999 to 2002. White also voiced Muriel in the 2006 video game "Cartoon Network Racing." This really hit hard she was a very important part of any late '90s to early 2000 kids' cartoon habits. This is so sad she will truly be missed!!!!!