Prince William and Kate will be in Twickenham tomorrow - Saturday - as England take on Wales in the Six Nations.

And with the Duchess of Cambridge newly appointed as the patron of English rugby, she will be cheering on the men in white while her husband will be backing Wales.

It is the first time that the famously competitive couple have gone head to head in the stands as the two teams take to the pitch.

In the past, they have battled each other in everything from dragon boating to wind buggy racing at royal engagements.

Prince George has cheered on England on the football pitch, however it is not clear which side of the rugby divide he and his siblings - Charlotte and Louis, will sit.

Kate met players from both the England men's and women's teams earlier this month after taking up her post, replacing Prince Harry.

She has been named at the figurehead and a champion for both the Rugby Football Union and Rugby Football League.

She said: "I am so thrilled to become patron. Two fantastic organisations who are committed to harnessing the power that sport can have in bringing communities together and helping individuals flourish.

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"I look forward to working with them across all levels of the games, and to cheering England on in what promises to be an exciting year for both sports!"

The RFU issued a video on social media featuring Kate throwing a rugby pass to a series of players, including many famous names.

In the video passing chain, Kate throws the ball which lands in the hands of Thea Northcott, a rugby union community game player, who passes it on to Harry Newman from the England rugby league men's team.

The footage also features Jodie Cunningham from the England rugby league women's team, Maro Itoje from the England rugby union men's team, James Simpson from the England rugby league wheelchair men's team, and Poppy Cleall from the England rugby union women's team.

The Duchess of Cambridge will now be one of the public faces of the Rugby Football Union, which acts as the governing body for grassroots and elite rugby union in England, with 1,900 member clubs.

RFU chief executive, Bill Sweeney, said: "We know the support of the duchess will be greatly valued."