Amanda Holden looks incredible in skintight blue dress as she toasts the Queen in on-air Platinum Jubilee party

AMANDA Holden is already swept up in the pomp of the Queen's Platinum Jubilee after enjoying a tea party with her radio co-stars.

The Britain's Got Talent judge, 51, slipped into a skintight blue dress as she toasted Her Majesty's momentous milestone on-air.

Amanda's strapless dress skimmed her curves in all the right places and she teamed it with a matching pair of blue gemstone heels.

The glamorous mum-of-two even raised a china tea cup for the Queen, who is set to mark 70 years on the throne this week.

Amanda was joined at the red, white and blue tea party by her Heart FM Breakfast Show co-stars Jamie Theakston and Ashley Roberts.

Patriotic Jamie wore a Union Jack waistcoat to their Platinum Jubilee bash, while US star Ashley opted for a smart white dress and matching hat.

During Wednesday's Breakfast Show, Amanda and Ashley were quizzed on British manners by William Hanson.

The professional etiquette coach asked the pair a number of questions about how they would behave in the presence of the Queen. They even had to show him their courtesies.

But incredibly, it was former Pussycat Doll Ashley who won the challenge, despite being a native American.

To mark her triumphant win, Heart FM bosses have bought Ashley - who was born in Phoenix, Arizona - an official Lady title.

Sharing a copy of the certificate on Instagram, she gushed: "Oh em gee!! I'm a lady ya'll! I'm legit excited about this!"