There are a bunch of child stars who grew up and became really creepy, but this list takes it a step further. These are the child stars who grew up to be creepy, because these days, they look like Muppets. That's right, these once adorable famous children now look like something Jim Henson created. From Boy Meets World's Topanga and The Partridge Family's Danny Bonaduce... to Miss Piggy and Beaker. These funny looking washed up child actors can now add "Muppet Doppelgänger" to their resumes, right next to "has-been."What celebrity children became weird looking adults? There are plenty of odd looking celebrities out there and this list of former child stars who now look like Muppets chronicles some of the specifically tragic cases of pre-pubescent cuteness gone awry.