They were mercilessly mocked on social media for their scene-stealing hats at Prince William and Kate Middleton's 2011 wedding.

But Princesses Beatrice and Eugenie left royal watchers disappointed with their "boring" headwear choices at Prince Harry and Meghan Markle's nuptials.

Eugenie, 28, wore a light blue tweed Roksanda Viola dress with a conservative pill box hat by Stephen Jones.

Princess Eugenie at Harry and Meghan wedding. Photo / Getty Images
Princess Eugenie at Harry and Meghan wedding. Photo / Getty Images

Older sister Beatrice, 29, wore a teal dress by designer Gainsbourg and headband by Fiona Graham.

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Princess Beatrice at Harry and Meghan's wedding. Photo . Getty Images.
Princess Beatrice at Harry and Meghan's wedding. Photo . Getty Images.

Their looks on Saturday were a far cry from the eye-catching fascinators worn by the sisters at Kate and William's nuptials in 2011.

Eugenie and Beatrice's hats at Kate and William's wedding. Photo / Getty Images
Eugenie and Beatrice's hats at Kate and William's wedding. Photo / Getty Images

Beatrice and Eugenie raised eyebrows with their choice of headwear, made by renowned hat designer Philip Treacy.

Princess Eugenie at William and Kate's wedding. Photo / Getty Images
Princess Eugenie at William and Kate's wedding. Photo / Getty Images

Their hats were mocked by social media users, with Beatrice's choice likened to everything from a pretzel to a toilet seat.

Princess Beatrice at William and Kate's wedding. Photo / Getty Images
Princess Beatrice at William and Kate's wedding. Photo / Getty Images

But it seems that Beatrice and Eugenie can't win when it comes to public opinion, with Twitter disappointed the sisters hadn't worn equally extra headwear to Harry's wedding.