Kate Middleton's Most Affordable Fashion

Kate wore a $56 Topshop dress for the society wedding of Prince George's godfather William Van Cutsem — and for a visit to the Harry Potter studios with William and Harry.

For the official "going away" picture after her wedding, Kate chose a blue Zara dress for $74. The thrifty duchess wore it again for a church service celebrating Prince Philip's 90th birthday and for a trip to Nottingham with the queen.

At the unveiling of her first portrait, Kate selected a deep-red Whistles dress for $133. She had previously worn it for a trip to Copenhagen and later on an engagement to Newcastle.

On the last day of her Asian tour, Kate chose Azuni earrings for $37.

By the time she wore this Oasis sweater dress, it was long out of stock, but it's likely she would have only splashed out around $45 for it.

Kate chose this ASOS maternity design for $59 when she was pregnant with Princess Charlotte.

On her most recent tour of India, the duchess stepped out in a $74 maxi dress from UK brand Glamorous.

For an engagement while she was pregnant with Princess Charlotte, Kate wore an $89 bird-print design from Jonathan Saunders for Debenhams.

Seraphine has become a maternity favorite for the duchess, and she chose its $146 Florrie dress for an engagement in Kensington last year.

Kate has worn her $74 cultivated pearl and zirconia Heavenly Necklaces earrings on many occasions — including here to the Diamond Jubilee Service of Thanksgiving.

Effortlessly combining designer with high street once more, Kate wore a Dolce & Gabbana dress with a $74 Zara cape coat for the queen's 90th birthday horse show.

The duchess wore a $45 Topshop dress to an engagement back in 2013.

These $12 Accessorize earrings had many outings on the Cambridges' recent tour of India.

A teal Zara dress was teamed with a Whistles jacket for a kids' production of The Lion, the Witch and the Wardrobe.

On safari in India, Kate paired a pink-and-black Topshop dress for $111 with $89 wedges from Dune.

Back in 2011, Kate chose a black-and-white Zara dress costing $103 for a Princes' Trust concert.

The duchess is a fan of the $111 Cezanne print dress from Great Plains. She wore the berry-colored version to an engagement in Grimsby and the green-and-blue-toned design for the Christmas Day church service in 2015.

Kate wore a pattered Zara blouse for $59 at an engagement in Wales just after the birth of Prince George — she had previously worn it on a trip to Switzerland.

Gap shirts are a staple of Kate's wardrobe, and she has worn various designs in public, as well as this $52 gingham print for a trip to a vineyard in New Zealand.

For a visit to the set of Downton Abbey, Kate chose a $102 coat from JoJo Maman Bebe.

. . . and what list of Kate's most budget-friendly items would be complete without her beloved Zara skinny jeans? They cost $45, and Kate has them in many colors including royal blue, black, and navy.