Meghan Markle's and Kate Middleton's fashion choices can lead to huge spikes in sales — here are some of the brands they love

Middleton tends to have a more traditional sense of style, while Markle's clothes are more trendy.
Some of their favorite brands include Line The Label, Stella McCartney, and Jenny Packham.

When Kate Middleton or Meghan Markle wear something, it sells out almost immediately.

The so-called "Kate Effect" and "Meghan Effect" have had drastic effects on the brands they wear, launching them into popularity and immediately selling out styles online. Middleton's and Markle's stardom also contributes significantly to the British economy, with Brand Finance estimating that Markle's joining the royal family this year could bring an$677 million Middleton's fashion-icon status contributed an estimated $205 million to the economy in 2015.

While Middleton opts for a more traditional wardrobe, Markle tends to be more trendy in her choices, though they both wear a mix of over-the-top expensive and surprisingly affordable clothes.

Keep scrolling to see some of the brands that Middleton and Markle love:

Line The Label

Markle wore this white coat from Canadian brand Line The Label, which sold out and crashed the brand's website minutes after photos of her wearing it were released. The label's president has decided to rename the coat "The Meghan" in her honor. The P.A.R.O.S.H. dress and Aquazzara shoes she wore also sold out and were renamed almost immediately.

Victoria Beckham

After Markle wore this sweater from the Victoria Beckham collection, which is available at Nordstrom, it sold out nearly immediately online.

Strathberry

This Strathberry bag sold out online seconds after Markle was seen carrying it. It has since been renamed "The Meghan."

Mackage

The same day, she wore the Elodie coat by Mackage. It sold out within hours of the photos of her wearing it were released, but it has since been restocked.

Stella McCartney

Markle wore this now sold-out Stella McCartney coat while visiting Cardiff Castle in Wales with Prince Harry.

Wolford

One of the few items that didn't sell out immediately after Markle was seen wearing it was this Wolford body suit, which costs $250.

Everlane

high-rise skinny jeans brown leather tote. The same day, she wore Sarah Flint's Natalie Flats, which are just about sold out.

Topshop

This $140 Topshop dress sold out almost immediately after Middleton wore it while visiting India.

Jenny Packham

Middleton is known to wear Jenny Packham designs, making the brand a go-to for celebrities.

Temperley London

She also wears Temperley London quite often, and the dresses she wears from the brand frequently sell out.

Catherine Walker

Catherine Walker is another one of the brands Middleton repeatedly wears.

Mulberry

Middleton was spotted in this pink Mulberry coat in December 2014, causing it to sell out online.

Reiss

She has also been spotted wearing Reiss dresses, like the "Shola" dress above. After she wore it to a White House occasion in 2011, the Reiss website crashed as fans tried to buy the dress for themselves. The style was later discontinued.