She signed the message with her initial, “C”.
The Red Roses are competing against the US tonight in their opening game at 7.30pm at Sunderland’s Stadium of Light, four years after their defeat to New Zealand.
Princess Kate became patron of RFU and RFL in 2022, taking over the role previously held by Prince Harry.
She even attended a Twickenham training session after announcing her new roles.
At the time, rugby league chief executive Ralph Rimmer praised the Princess while welcoming her and said: “We are delighted to welcome her as we prepare to host men’s, women’s, wheelchair and physical disability rugby league World Cups in England this autumn.”
Prince William is patron of the Welsh Rugby Union.
His aunt, Princess Anne is patron of the Scottish Rugby Union.
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