Biography: Piper Mackenzie Harris is an American former child actress and model. She is most famous for her role in the 2009 film G-Force, in which she plays Penny Goodman, a little girl who takes home one of the guinea pigs in the film. Piper is also known for her appearance on iCarly as the Crying Sunshine Girl and also for many television guest appearances on popular series including Big Bang Theory and Modern Family.