Hurry: Queen Letizia's $90 Zara Dress Is Still in Stock

If we had to guess, we'd say Zara is the most popular fast-fashion retailer among royals. We already know Kate Middleton is a dedicated fan, but Queen Letizia of Spain also knows how to find the chicest pieces at the cult-favorite store. For an event at the Zarzuela Palace on Tuesday, the impeccably dressed royal wore Zara's Printed Midi Dress ($90), which is simply perfect for fall. 

Her support for the brand makes sense: Zara is arguably the most famous brand from her home country. Princess Victoria of Sweden, on the other hand, is partial to Stockholm-based chain H&M. While royals often support up-and-coming local designers too, we can't blame them for paying allegiance to their country's best fast-fashion chains. 

Scroll down to see Queen Letizia's full look and shop her dress. 

Next up, shop the $55 bag Lauren Conrad carried on the red carpet.