Princess Beatrice Ignored This Royal Rule Kate Middleton Followed

Typically a bride will enlist the help of family and close friends to help celebrate the big day by making them part of the bridal party, but it was a different story for Kate Middleton's sister, Pippa.

Pippa took on the honorable task of maid of honor to Kate for her 2011 marriage to Prince William. However, the Duchess of Cambridge wasn't able to return the favor when Pippa married in 2017, whether she wanted to or not, due to royal etiquette.

Since Kate is in line to be the future Queen of England, she was unable to take on the responsibility for her sister, according to Express. In addition, the Daily Mirror reported that "bridesmaids were traditionally chosen from unmarried women of marriageable age in the bride's family," and Kate being a married woman wouldn't fit the bill.

READ: Princess Beatrice's Wedding Will Introduce A New Royal Member And It's Not Her Fiancé

While Kate held true to royal traditions, Princess Beatrice was able to bypass the very same rule when her sister, Princess Eugenie, got married. Metro reported that Kensington Palace confirmed Bea's role as maid of honor, along with the rest of the wedding party, just days before their 2018 nuptials.

Now that Princess Beatrice is engaged, it's likely that rule will subside so that Princess Eugenie can be by her side. While her sister and other members of the royal family are all likely to be a part of the upcoming royal wedding in some way, there is one royal member who could get snubbed -- Prince Louis.

There's a good reason, though. He's currently only 1-years-old which means the youngest of Kate Middleton's children is just a tad too young to have a role in the wedding.