Before they could see their name in lights, these celebrities had to make ends meet working for other celebrities.

Kim Kardashian famously worked as Paris Hilton's closet stylist before she became a household name in her own right, but she also did the same for Serena Williams. Her sisters Kourtney and Khloé also picked up some gigs as assistants in their pre-fame days.

From babysitting gigs to teaching calligraphy, see which 15 celebrities worked for other stars before hitting it big in honor of National Boss's Day.