David Cameron replaces Harry as Kate Middleton and Prince William"s "spare part" at Olympic Stadium

Who's the gooseberry, now David Cameron replaces Harry as the 'spare part' as he joins Kate and Wills in the Olympic Stadium

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UPDATED:

11:55 GMT, 6 August 2012

Just when they thought they had lost one gooseberry, another one turned up to take his place.

Wherever the Duke and Duchess of Cambridge have ventured during the Olympics, Prince Harry has never been far behind.

More often than not, he has been sat in the very next seat, not that they minded, of course.

New Gooseberry: The Duke and Duchess of Cambridge applaud during the athletics in the Olympic Stadium as David Cameron looks sternly

New Gooseberry: The Duke and Duchess of Cambridge applaud during the athletics in the Olympic Stadium as David Cameron looks sternly

Not much conversation: The trio seem lost in their own thoughts as they wait for the action to get under way

Not much conversation: The trio seem lost in their own thoughts as they wait for the action to get under way

Tonight, he was nowhere to be seen as Kate and William enjoyed a thrilling evening of athletics in the Olympic Stadium.

Instead they welcomed David Cameron to join them, but the Prime Minister at times sat awkwardly as the married couple joked and gazed into eachother's eyes.

Aside from Jessica Ennis's sensational gold medal in the heptathlon, Kate and William got the loudest roars of the evening when they were shown on the big screens.

William sported a trendy red cap and white Team GB polo shirt, while Kate opted for a blue Team GB fleece, combining the colours of the Union Jack.

Alone time: Kate and William, who created a patriotic ensemble with their outfits, share an intimate moment

Alone time: Kate and William, who created a patriotic ensemble with their outfits, share an intimate moment

Popular: Kate and William attracted huge roars from the crowd at one point when they were flashed up on the big screen

Popular: Kate and William attracted huge roars from the crowd at one point when they were flashed up on the big screen

Mr Cameron went for a more formal dark blue suit and light blue, open-necked shirt with a London 2012 pin badge.

They were among a packed stadium who waited for Team GB poster girl Ennis to complete her heptathlon victory in the 800m and she did so in emphatic fashion.

The Duke and Duchess of Cambridge were also joined by Lord Coe for the second evening of action in the stadium.

What's so funny Kate and Harry are having a great time watching Britain's gold medal victory at the Olympic Velodrome on Thursday. A pensive William can't see the joke

What's so funny Kate and Harry are having a great time watching Britain's gold medal victory at the Olympic Velodrome on Thursday. A pensive William can't see the joke

Equestrian get-together: Kate and Harry would rather chat and Wills watches the action in Greenwich Park

Equestrian get-together: Kate and Harry would rather chat and Wills watches the action in Greenwich Park

William and Kate have been strong supporters of the Games and showed their support for 26-year-old Sheffield girl Ennis.

Harry's continual presence with the couple earned him the nickname the 'royal gooseberry' earlier this week and he has been likened to Owen Wilson's character in the hit film You, Me And Dupree, in which Wilson’s best man character stays on as a houseguest with newlyweds Matt Dillon and Kate Hudson, much to the couple’s annoyance.

Such speculation is utterly ludicrous, of course. There is no jealousy and no awkwardness, but the pictures of them together at the Olympics do throw a fascinating spotlight on just how close the three of them have become.

Bright sparks: Greeting the Olympic flame at the Palace on July 26

Bright sparks: Greeting the Olympic flame at the Palace on July 26

Clown prince: Harry keeps things light visiting a South London school last month

Clown prince: Harry keeps things light visiting a South London school last month