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ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton and Catherine, Duchess of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)

ENGLEFIELD GREEN, ENGLAND - MAY 20:  Pippa Middleton and Catherine, Duchess of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England.  (Photo by UK Press Pool/UK Press via Getty Images)

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ENGLEFIELD GREEN, ENGLAND - MAY 20: Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)

ENGLEFIELD GREEN, ENGLAND - MAY 20:  Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England.  (Photo by Samir Hussein/Samir Hussein/WireImage)

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ENGLEFIELD GREEN, ENGLAND - MAY 20: Britain's prince George (L), a pageboy, attends the wedding of his aunt Pippa Middleton to James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Justin Tallis - WPA Pool/Getty Images)

ENGLEFIELD GREEN, ENGLAND - MAY 20: Britain's prince George (L), a pageboy, attends the wedding of his aunt Pippa Middleton to James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England.  (Photo by Justin Tallis - WPA Pool/Getty Images)

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ENGLEFIELD GREEN, ENGLAND - MAY 20: Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend for the wedding Of Pippa Middleton and James Matthews as a page boy gestures at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Pool/Samir Hussein/WireImage)

ENGLEFIELD GREEN, ENGLAND - MAY 20:  Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend for the wedding Of Pippa Middleton and James Matthews as a page boy gestures at St Mark's Church on May 20, 2017 in Englefield Green, England.  (Photo by Pool/Samir Hussein/WireImage)

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ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge and Prince George of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)

ENGLEFIELD GREEN, ENGLAND - MAY 20:  Catherine, Duchess of Cambridge and Prince George of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England.  (Photo by Samir Hussein/Samir Hussein/WireImage)