The little girl - sister to Brooklyn, Romeo and Cruz - was born in LA on 10 July 2011 and was given the name of Harper Seven.
Ever since, we've been obsessed, cooing over zillions of snaps of the little'un and anticipating what she will be wearing nearly as much as her designer mother.
And she'll have extra reason to celebrate today as she has been voted Most Stylish Celebrity Baby in a survey conducted by the UK’s leading manufacturer of personalised baby products My1stYears.com.
So, as she blows out the one candle on her birthday cake today, we present you with her first year in (very, very cute) pictures.
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