The 25-year-old and her 34-year-old beau whisked their close family and friends off to Tuscany for the special day.
The wedding was reportedly conducted at an old medieval church in the city, overlooking Montalcino valley and its vineyards.
The model was pictured in a white gown with intricate lace sleeves, and wore her hair in a side parting with loose waves and a veil.
Ahead of the wedding, Kate admitted that she thought wedding planning "sucks".
She told Extra: "I'm really excited about the engagement and I'm really excited about getting married. It's just the wedding planning sucks."
And the curvaceous star admitted she had no intentions of going on a diet before her big day.
"I never get on a scale because you can't judge yourself for how much you weigh. What really matters is how good I feel."