As you're probably now aware, Henry is Prince Harry's real name, which is used above, however, his bride-to-be's real name, Rachel, wasn't included, despite the Queen using it when giving the pair her consent to marry.
In Her Royal Highness' statement she wrote, "I declare My Consent to a Contract of Matrimony between My Most Dearly Beloved Grandson Prince Henry Charles Albert David of Wales and Rachel Meghan Markle."
So why now is the palace referring to Rachel as Meghan?
"Even though it's an official occasion, they've obviously decided that she's known to as everybody as Meghan Markle and issued the invitations under that name," Grant Harrold, a British etiquette expert told GoodHousekeeping.com.
However, despite the Duchess of Cambridge being referred to worldwide as Kate Middleton, rather than her real name of Catherine, her 2011 wedding invitation with Prince William used her full name.
Perhaps this is just one more way Harry's American bride is defying royal protocol.