Meghan Markle and Prince Harry may have committed major wedding etiquette faux pas

Are Meghan Markle and Prince Harry guilty of a wedding faux pas?

ITV's royal editor Chris Ship got an up close and personal look at four invitations to Meghan and Harry's May 19 nuptials, and it turns out not everyone received a plus, including some guests who are married. Only two out of the four that Ship has seen include a plus one.

"Unlike most other weddings, Harry and Meghan are inviting only one half of couples. Seen an invite for a husband but not his wife. Sounds a bit tight, but I’m sure they’d claim space is limited in St George’s Chapel... #RoyalWedding," Ship wrote on Twitter. The royal writer also made sure to specify that these invites are only for ceremony and afternoon reception, but not the smaller evening reception.

Ship also added that one invitation read, "for a Mrs. without her Mr." while the other cards invite a Lord and a Lady, a Mr. and Mrs and the last one was to a couple.

Normally, spouses, fiancé(e)s and live-in romantic partners must be invited with wedding guests. Given the seating restraints of St. George's Chapel, where the couple will say "I do," it's no surprise that they only extended plus ones to certain couples.

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Myka Meier, an expert in etiquette, told Town & Country that Harry and Meghan may not have given plus ones to people they only have business relationships with.

"If the invitation was made on a professional basis, they are much less likely to get a plus one. For instance, at the last royal wedding, they invited 80 workers from some of the charities the couple supported. These would be considered professional and not necessarily given a plus one," Meier said.

The guest list has remained hush-hush so far, but we can expect to see 2,640 members of the public in attendance. Many details of the big day have been confirmed, including their flowers and cake. The big detail that has remained a mystery? Meghan's wedding dress. For more on that, watch the video above.

RELATED: Every time Meghan Markle has broken royal protocol:

[h/t Town & Country]