The 29-year-old, who tied the knot in St George's Chapel in Windsor Castle on October 12, was previously referred to as 'Princess Eugenie' or 'Princess Eugenie of York.'
However, according to reports, in recent days Court Circular has been calling her 'Princess Eugenie, Mrs. Jack Brooksbank.'
Princess Eugenie and her now husband Jack had been dating for seven years before saying 'I do' after meeting on a ski trip.
Recalling the moment Jack popped the question, Eugenie told the BBC: "The lake was so beautiful, it was a special light and I even said, 'This is an incredible moment' and then he popped the question, which was really surprising even though we had been together seven years.
"It was the perfect moment because we knew it was going to end up this way. I was over the moon, crying."
Now, with the couple heading into their ninth month of marriage, royal fans are certain the pair are set to make a baby announcement soon.
Meanwhile, mother Sarah Ferguson has previously revealed she would be an “excellent” grandmother in the future.
She told BBC: “I used to write children’s books, and I am a child, I haven’t grown up.”