Kate Middleton & William celebrated another occasion today

Prince William and Kate Middleton will celebrate St Patrick's Day together with the Irish Guards.

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They wished their followers a happy St Patrick's Day on Twitter.

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The couple will join the Irish Guards for the St Patrick's Day parade.

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Kate Middleton will take the salute as Colonel of the Irish Guards during a visit to Mons Barracks.

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This will be her first time taking the salute for the Irish Guards.

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[{"selector":"#anim-6a8c0c15-9c86-4863-91a1-eccb2dc9e897 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate(6.3636363868049415%, 0%) scale(1.5)","translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-aed0acdd-841c-4a27-8767-3233605a501c","keyframes":{"opacity":[1,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-9735b88f-438d-40e4-a128-5356161d1d1b","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Prince William, the regiment's outgoing Colonel, will be watching her from the wings.

The event is considered historic for the royal couple.

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[{"selector":"#anim-d9dd70e0-cd87-4924-ba71-944501be07af [data-leaf-element=\"true\"]","keyframes":{"transform":["translate(0%, 0%) scale(1.5)","translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-a4d53676-7b4d-4b10-9f0e-38cc66db94c1","keyframes":{"opacity":[1,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-0f1ab3eb-3fa6-4e5f-be1d-4a8f18cf7eeb","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] There were earlier reports about Kate Middleton preparing for a special event on St Patrick's Day.

[{"selector":"#anim-8af83136-34ad-4670-810e-457037881f43 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate(0%, 0%) scale(1.5)","translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-7a81c711-82ea-406b-805a-5b771f651c21","keyframes":{"opacity":[1,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-82915fa6-0771-48f4-8666-9c90ee3b995b","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] The couple's Twitter message suggests they are looking forward to the celebration.