So, when the pint-sized duo were spotted in New York City yesterday sporting brightly colored tresses, we were surprised to see them jump aboard the neon hair color trend worn by celebs like Lady Gaga, Kelly Osbourne, and Rihanna.
With their visible, dark rooted locks dipped in intense pink and yellow hues, the Olsens played up their new hair color with tousled waves and dark sunglasses.
While this isn't the first time Ashley has experimented with extreme color, this is definitely a first for the twins in statement-making hairstyles.
And they looked so normal the night before, at the launch party for MarktBeauty.com. Perhaps their hairstylist Mark Townsend made them wait a day before trying on this daring trend?
What do you think about Mary-Kate and Ashley's neon hair color? Is it too wild? Or is it a fun look perfect for summer?
Leave a comment below and be sure to check out the best hair color for your face shape and complexion.