Kate Middleton makes a surprising debut as Colonel of the regiment.

The annual St Patrick's Day Parade hosted by the Irish Guards had a fascinating twist this year.

Prince William handed over his role to Kate, expressing both sadness and admiration.

Kate dazzled in a teal custom coat and matching hat by Catherine Walker.

Sprigs of shamrock were presented by Kate to officers, guardsmen, and even an Irish wolfhound!

The parade ended with a majestic royal salute and march past, led by the new Colonel.

The couple met with the esteemed Irish Guards Association, comprised of former guards.

To end the visit, William enjoyed a pint of Guinness while Kate savored a half pint.

A surprising and captivating day for Kate Middleton, leaving everyone amazed by her new roll