Derek Hough vs. Julianne Hough: Which Dancing With the Stars Pro Is Older? (PHOTO)

You watch Derek Hough shake it in the ballroom each week on Dancing With the Stars and you've seen his sister Julianne Hough break it down in Rock of Ages, but do you know which of these blondies was born first?

Believe it or not, Derek is three years older than his sister. The DWTS male pro is 27 and his little sis is 24.

Maybe it's her mature red carpet looks, or the fact that she's dating the much older Ryan Seacrest, but we think Julianne can totally pass for older than Derek! Are you surprised? Let us know in the reaction buttons below.

Dancing With the Stars airs Mondays and Tuesdays on ABC.

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