The Duke of Cambridge stood for the national athemn before taking his front-row seat ahead of the England team's final group match of the European Championship. The spectacle is a belated birthday treat for William who turned 39 yesterday. Fans of William praised his decision to attend the game to support the Three Lions from the sidelines. One fan said: "Yes William, bring us some luck!"

       Another fan tweeted: "Is Prince William singing God save the Queen the most natural thing ever or the most surreal thing ever?"

       Another said his presence at the stadium meant England are "already ahead".

       And a third wrote: "England is ahead because Prince William is at the #ENGCZE game tonight as the President of the FA."

       The duke serves as President of England's Football Association.

       One fan watching the game on TV said: "It's lovely seeing the Duke of Cambridge PrinceWilliam at the football tonight, Czech Rep v England. Good luck England."

       As an avid football fan, the duke has taken a keen interest in England manager Gareth Southgate's team and the progress of the other home nations.

       In a recent tweet, William said: "Wishing all the best to the Home Nations competing this summer - looking forward to a fantastic tournament! W"

       England is already through to the last 16 in the Euros.

       But the team can secure top spot in the group and home advantage for the next round with a victory tonight.

       If the game ends in a draw it would be enough for the Czechs, who have also qualified for the knockout stage, to clinch top spot.

       Yesterday, birthday messages for William flooded in from fans and relatives as the future King celebrated his latest milestone.

       The Queen posted a series of adorable pictures of her grandson on Twitter, showing him donning his military uniform, carrying out a royal engagement and standing on the palace balcony with Kate and their children.

       The monarch wrote: "Wishing The Duke of Cambridge a very Happy Birthday today! #HappyBirthdayHRH."

       William is five months younger than his wife the Duchess of Cambridge, who turned 39 in January.

       The celebrations came a day after the duke appeared in public with his two eldest children on Father's Day.

       Prince George, seven, and Princess Charlotte, six, accompanied their dad when he surprised runners at a race around Sandringham Estate.

       The young royals were dressed casually for the outing and enthusiastically joined their dad in counting down to the start of the race.

       Run Sandringham welcomed hundreds of runners of all abilities and ages to run a half-marathon, a 5K or a community mile, with the aim of raising "many thousands of pounds for good causes".

       The Cambridges' country mansion Anmer Hall is situated nearby.

       The family-of-five often drive up from London to spend weekends and school holidays at the residence.

       The house surrounded by lush gardens was gifted to William and Kate by the Queen upon their marriage in 2011.

       More to follow...