Weddings can be a tricky style area to navigate. White is off the cards, you can't upstage the bridal party and there's always the chance that someone will show up in the very same Topshop dress as you. Oh and the other question: Hat or no hat?
The queen of appropriate wedding dressing is, of course, our very own Duchess of Cambridge. Wedding Pinterest boards are flooded with her matchy matchy twinsets and fascinators. At the wedding of Lucy Meade and Charlie Budgett this weekend it looks like one woman followed Kate Middleton's wedding style rules, as she opted for an old Kate favourite.
Oops! Kate and unidentified guest wear the very same coat [Getty]
The unidentified lady wore the blue tweed coat from M Missoni's Autumn Winter 2010 collection, which Kate wore on a Jubilee appearance in 2012. But this Copy Kate had one big problem: the ultimate re-wearer Kate Middleton was in attendance in the very same dress. Uh oh!
Turning up in the same outfit as someone else is a hazard for the princess who wears high street. Note to self: do not wear a Kate Middleton favourite when the repeat re-wearer is in attendance.
The Duchess of Cambridge, Prince William and Prince Harry at Lucy Meade & Charlie Budgett's Wedding [Getty]
The Duchess bought the M Missoni's jacket from Bicester village in Oxfordshire, which was £765 before the reduction. She first wore it to a visit to Fortnum and Mason with the Queen and the Duchess of Cornwall two years ago in March 2012.
Our friends over at What Kate Wore, quickly identified Kate's latest look as under the coat she wore her blue floral Whistles Bella dress she wore to the London 2012 Closing Ceremony, with gold Cassandra Goad earrings and black Episode heels. Kate is an expert at wedding dressing, so if you want to get her look follow her wedding-guest style rules here.
See Kate Middleton's style evolution in the gallery below...
Kate Middleton at the mens singles final of the Wimbledon Championships - July 6, 2014
Kate Middleton visits an M-PACT Plus Counselling programme - July 1, 2014
Kate Middleton at the ANZAC Day commemorative service - April 25, 2014
Kate Middleton at a service during the D-Day 70 Commemorations - June 6, 2014
Kate Middleton during an official visit to Bletchley Park - June 18, 2014
Kate Middleton and Prince George of Cambridge at the Royal Charity Polo - June 15, 2014
Kate Middleton at the Ben Ainslie Racing America's Cup Launch Event - June 10, 2014
The Duchess of Cambridge wearing Jonathan Saunders in Scotland - 29th May 2014
The Duchess of Cambridge in Hobbs at Ayers Rock - 22 April 2014
The Duchess of Cambridge in Lela Rose in Canberra - 24 April 2014
The Duchess of Cambridge in Alexander McQueen at Adelaide - 23 April 2014
The Duchess of Cambridge in Catherine Walker in Canberra - 24 April 2014
The Duchess of Cambridge at Taronga Zoo in Sydney - 20 April 2014
The Duchess of Cambridge in Roksanda Ilincic in Uluru - 22 April 2014
The Duchess of Cambridge in Zimmerman at Manley Beach - 20 April 2014
The Duchess of Cambridge in Alexander McQueen at Easter service, Ausralia - 20 April 2014
The Duchess of Cambridge in L.K. Bennett at Amberley Air Base - 19 April 2014
The Duchess of Cambridge in Christchurch, New Zealand - 14 April 2014
The Duchess of Cambridge in Roksanda Ilincic arriving in Sydney, Australia - 16 April 2014
The Duchess of Cambridge in Rebecca Taylor leaving New Zealand - 16 April 2014
The Duchess of Cambridge in Diane Von Furstenberg in Blue Mountains, Australia - 17 April 2014
The Duchess of Cambridge in Zara wine tasting in New Zealand - 13 April 2014
The Duchess of Cambridge in Jonathan Saunders at rugby in Dunedin, New Zealand - 13 April 2014
The Duchess of Cambridge in Erdem at Avanti Drome in Hamilton, New Zealand - 12 April 2014
The Duchess of Cambridge in Emilia Wickstead at Dunedin - 13 April 2014
The Duchess of Cambridge in Zara and J Brand at Auckland harbour, New Zealand - 11 April 2014
The Duchess of Cambridge in Jenny Packham at State Dinner, New Zealand - 10 April 2014
The Duchess of Cambridge in Tory Burch in Wellington, New Zealand - 9 April 2014