Duchess Kate's outfit was the source of much attention last night.

The Duke and Duchess of Cambridge attended a state dinner held at Buckingham Palace last night to welcome the King and Queen of the Netherlands. The mum of three wore the Lover's Knot Tiara to the event which was a favourite of Princess Diana and unsurprisingly, Twitter users were eager to discuss her outfit.

The Duke and Duchess of Cambridge accompany State Visit guests, including Prime Minister Theresa May, to The Netherlands State Banquet held in the Ballroom at Buckingham Palace. pic.twitter.com/1aMGtemN0I

— Kensington Palace (@KensingtonRoyal) October 23, 2018

People were in awe of the sparkly tiara but her Alexander McQueen dress wasn't liked by everyone with some suggesting that her stylist could have chosen better.

the Cambridge Lover's Knot tiara! ??? #PrincessDiana #DuchessofCambridge pic.twitter.com/kMvieoNfwZ

— sara ? (@spikewellsx) October 23, 2018

The 36-year-old is a huge fan of McQueen designs with Sarah Burton, the brand's creative director, designing Kate's wedding gown back in 2011. Kate also wore some statement jewellery to finish off the ensemble and it's definitely a dazzling effect. However, it was the material of the dress that most people commented on with many questioning the "crinkled" fabric.

My opinion about the dress that the Duchess of Cambridge wore to the State Banquet: 1. Don't like the dress.2. Why would her stylist choose this dress when there are so many beautiful dresses out there! 3. Love the necklace & tiara ?#DuchessofCambridge pic.twitter.com/nuW3DzStdj

— Vinyl Duchess (@MasterpieceDiaz) October 24, 2018

I farking love Kate and 90% of her wardrobe but this is a firm no from me. I swear I had a party dress that looked like this in 1989 ??‍♀️?? #DuchessofCambridge #katemiddleton #taffeta #taffetafordays pic.twitter.com/jK14nCge54

— Susan Brougham (@susan_brougham) October 23, 2018

I am such a #royalnerd! Loving all the jewels and tiaras at the Dutch state dinner!! #DuchessofCambridge #RoyalFamily #statedinner https://t.co/gJQ5lGDfzo

— Amanda Romanello (@abromanello) October 24, 2018

Ain't fans of the dress but Kate always make it attractive tbh. Yes! not a big hit and here the future queen still slaying with her jewelry, charm, and elegance #KateMiddleton #DuchessOfCambridge ?? https://t.co/SK5JrdHZCW

— The Duke and Duchess of Hyunness (@uchatadara) October 24, 2018

The dress is like something dragged out of The Princess Royal’s wardrobe from the 1980’s . Horrible shiny crinkled material. #DuchessofCambridge #RoyalVisit

— Niamh Leahy (@devlingirl) October 23, 2018