Credit: Alison Jackson/Rex/Rex USA

Fairy tale wedding, fairy tale hookup!

When Prince William and Kate Middleton tied the knot in London April 29, their sexy siblings nearly stole the show -- as did hopeful speculation of a hookup between flirty Best Man Prince Harry and Maid of Honor Pippa Middleton.

Now, funny photographer and videographer Alison Jackson has recreated "outtakes" from that unforgettable wedding day -- using lookalike models to recreate the tryst that never was.

In hilarious (and convincing!) pics, a doppelganger for Harry, 27, gropes the world-famous derriere of Pippa, 28, as they party in the palace alongside William and Kate, 29, all of them in their iconic wedding-day finery.

In another staged shot, a shirtless "Harry" checks out a half-naked "Pippa," who covers up in his military wedding-day coat, as she sneaks out of his room the morning after the blowout bash.

According to the Daily Mail, "Pippa" is model (and a speech therapist by day) Sarah Carrington, 32, who began working with Jackson in October.

The Harry-Pippa hookup -- including footage of the twins partying at the reception, feeding one another cake and more -- plays out as an extra on the Blu-Ray DVD edition of hit comedy Bridesmaids.

Just hours after the royal wedding, fans demanded a Harry-Pippa fling via a Facebook group entitled "Pippa Middleton is single -- Prince Harry likes this." The still-active page now boasts 127,940 fans.

And, to be fair, both British hotties are now available. Currently in Arizona completing his Apache helicopter training, Harry is on the outs with longtime love Chelsy Davy; Middleton and beau Alex Loudon called it quits last month.