Kate Middleton, Meghan Markle
Kate Middleton and Meghan Markle usually carry their bags on the left due to a royal etiquette rule. Pictured: Middleton, Markle arrive to attend Christmas Day Church service at Church of St Mary Magdalene on the Sandringham estate on December 25, 2018 in King's Lynn, England. Getty Images/Stephen Pond

Kate Middleton and Meghan Markle usually hold their bags on their left, and there is a reason why this might be the case.

Myka Meier, a royal etiquette expert, said that holding the bag on the left means leaving the right hand free to greet members of the public. Shaking the hands of another person is usually done using the right hand so it needs to always be available.

According to the expert, Princess Diana also used to do the same thing. Meier uploaded a series of photos of the late Princess of Wales carrying different types of bags using her left hand. In one of the snaps, the mom of two is wearing an all-yellow ensemble and her left hand is holding a small black bag. Princess Diana reaches out her right hand to greet the man in front of her.

In another photo, Prince Charles’ ex-wife is wearing an all-red ensemble. After being escorted out of her car, she once again held her small red clutch bag on her left hand. Princess Diana’s right hand is outstretched in a gesture that suggests she is about to shake hands with someone.

In related news, Markle and Middleton also made headlines today after it was reported that the Duchess of Cambridge might be feeling slightly eclipsed by the Duchess of Sussex.

Katie Nicholl, a royal author, told Entertainment Tonight that Middleton may not be all too happy to see Markle receive more media attention than her. The “Suits” alum just joined the royal family last year, while Middleton has been married to Prince William for almost eight years.

“I think there was a lot of worry about whether one would upstage the other. That didn’t happen, but there does seem to be a little concern about the two women carrying out engagements on the same day,” she said.

Nicholl said that this may be because the newspapers and online outlets do not know which of the two female royals should they put on their front page.

However, despite the possible issue of upstaging each other, Nicholl said that Middleton and Markle are not feuding.