We all start somewhere, and for these celebrities, they all started as someone's babysitter. But because this is Hollywood, the tiny tots they looked after grew up to become celebs themselves. Kiefer Sutherland, Cher, and Michael Bolton all used to babysit today's biggest stars.
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Click through the gallery to see which stars had to change another celeb's diaper before making it big.
"I was working in a theater with her mother in Williamstown, Mass., the Williamstown Theatre Festival, and I believe on a couple of occasions I was asked to look after her for an hour or two," Keifer said.
"I think it was very funny because it's unbelievable how fast someone goes from 13 to 18, and obviously they look so different that when Gwyneth started to work, I thought, 'Well, that must be another girl because I always remember her as being 11 or 12 years old.'"