Happy Birthday, Nicole Richie: Reality Star, Designer Turns 30 (PHOTOS)

Welcome to your 30s, Nicole Richie!

The reality star-turned-designer hits the big 3-0 September 21, and she sure has come a long way since we saw her on "The Simple Life" way back in 2003. We've seen her go from Paris Hilton's funky sidekick to boho-chic rocker wife and mom to two adorable kids, Harlow, 3, and Sparrow, 2.

"So long 20's!....." Richie tweeted on her birthday eve.

Richie isn't the only celeb to recently hit 30. Beyonce also said goodbye to her 20s earlier this month.

Check out the photos below to see Nicole Richie through the years and vote on your favorite look below!

Nicole Richie