Meghan Markle went to the Queen's exclusive Christmas party — and the dress she wore instantly sold out

Soon-to-be royal arrives in extravagant ensemble to commence series of festive arrangements

Markle and Harry are expected to spend Christmas Day at the Queen's private Sandringham House (Rex Features)

The "Meghan Markle effect" is definitely real, and it has caused yet another fashion item to instantly sell-out.

Meghan Markle and Prince Harry attended the Queen's annual Christmas lunch on Wednesday, and photos of their arrival to Buckingham Palace give us a sneak peek of Markle's ensemble.

Even though the photos only reveal a small glimpse of Markle's outfit, eagle-eyed fashionistas have discovered that she is wearing the Self-Portrait Nightshade Midi Dress by Jules B. The dress features a high-neck, semi-sheer bodice with floral lace and a full A-line skirt.

The dress retails for $377.99 (£283), but just like her iconic white wrap coat, it has already sold out in every size.

The dress has been bought out across retailers Jules B (Jules B)

A spokesperson for Kensington Palace previously confirmed to AP that we "can expect to see the Duke and Duchess of Cambridge, Prince Harry and Ms Markle at Sandringham on Christmas Day," so this is just the beginning of Markle's holiday festivities with the royal family.

INSIDER has reached out to Jules B for comment.

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