Kate Middleton opts for primrose yellow Alexander McQueen coat as she attends Harry and Meghan's wedding

After commanding attention at her own royal wedding seven years ago, the Duchess of Cambridge today opted for a beautifully understated look to watch Meghan and Harry say their vows.

Wearing a primrose yellow coat dress by Alexander McQueen - the very same fashion house that designed her own wedding dress - Kate subtly stunned as she stepped out of the car with Meghan's pageboys and flower girls ahead of the ceremony.

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Pairing the look with an oversized, slanted hat by Philip Treacy and pointed Jimmy Choo court shoes, she was the epitome of ethereal elegance as she clutched flowers in one hand and daughter Princess Charlotte in the other on the steps of St George's Chapel.

Meghan Markle talks about her wedding dress for the first time in this never-before-seen clip

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By Charlie Teather and Sophie Thompson

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While she was not an official bridesmaid, she took on a similar duty as she walked the flower girls and pageboys - including Prince George and Princess Charlotte - down the aisle at the opening of the service.

Scroll down to see some more of the stylish attendees arrive for the biggest wedding of the year...