Meghan Markle has been attending royal engagements throughout her whole pregnancy, so it is no surprise that she has racked up quite the clothing bill for her many maternity outfits.

According to Express, Markle's many, many outfits for the 75 engagements she attended while she was pregnant total to an estimated £634,000 ($827,839). But a royal expert told Global news that the Duchess of Sussex and her husband, Prince Harry, may not have paid for the outfits out of their own pockets.

Victoria Arbiter claimed that it was Markle's father-in-law, Prince Charles, who footed her lavish maternity wardrobe bill. And it's not just the pregnant duchess that he's apparently supporting as the royal expert claimed his estate also pays for the outfits of the other women in the royal family.

“Prince Charles pays for the wardrobe of he and Camilla, as well as William, Kate, Harry and Meghan," she said.

But her father-in-law doesn't pay for all of her clothing as Markle buys outfits she wears during her private time with her own money, according to the source.

"Meghan needs an official work wardrobe, and dressing for the part comes with the job," Arbiter added. “That’s a household expenditure. Clothes that she wears in her private time, she will be paying for herself.”

Arbiter went on to say that while Markle's maternity wardrobe may seem excessive, her mother-in-law, Princess Diana, and other women in the royal family also had a love for couture and spent quite a bit on designer clothing.

“Lady Diana wore pretty much nothing but designer wardrobe for official functions," the royal expert added.

Markle doesn't wear only designer outfits as she and sister-in-law Kate Middleton also step out in high streetwear from time to time.

“We do see Kate and Meghan incorporate high street brands in their outfits. Kate loves Zara; Meghan has worn Marks and Spencer," she continued. "They’ve both worn other high street brands.”

The money for their family's wardrobe reportedly comes from the Duchy of Cornwall Estate, which generally pays for the official household needs, including clothing, according to Yahoo's Royal Box.

The estate is a private fund that was created by Edward III back in 1337 to ensure that his son and heir, as well as the future heirs to the throne, had an income to run their households.

When Prince Charles ascends to the throne someday, Prince William will take over his father's title and estate as he will then be the heir to the throne.

Meghan Markle
Meghan Markle is pictured attending a Commonwealth Day Youth Event at Canada House on March 11, 2019, in London, England. Chris Jackson - WPA Pool/Getty Images