London - A ringside seat at next Saturday's spectacle is in the Swarowski crystal-encrusted Gucci bag for singer Cheryl.
According to a Chelsea postman with x-ray vision a gold-embossed Palace invitation signed 'Luv From Hazza' landed on La Cole's doormat this morning.
It comes as a week of hard-to-get by Prince Harry saw Cheryl resort to potent body language on last night's Graham Norton Show.
"Looks like Harry's finally twigged," the singer's publicist tweeted at lunchtime as news of next weekend's date broke.
The annual ceremonial display showcases the Queen's official birthday and is usually followed by a Palace jolly before younger royals are let loose on the capital's nightspots.
A sneak preview of hush-hush arrangements says Harry's likely to take Cheryl for some £500-a-pop of vintage Crystal champagne at the W Hotel's hugely fashionable Wild Bar.
Followed by dinner at The Ivy.
"Those two have been circling each other like lovelorn sleepwalking zombies," Cheryl's PR added, "ever since Monday night's concert outside Buck House."
Pals have confirmed stunningly attractive young divorcee Cheryl has always been upfront about her immense attraction to the gingernut royal.
Last week an interview in celebwatch site LAFagHagSlagMag.con saw Cheryl confide about a series of romantic dreams where she walks up the aisle at Westminster Abbey.
That's followed by a month-long honeymoon on the royal yacht and a lifetime of heroic shopping-for-England to lift the nation out of grim recession...
And of course a right royal title plus loads of regal bling when Mrs Harry Windsor secures the line of succession.
Princess Beatrice is 69.