The new design was first seen on Australian TV, as Today host Georgie Gardner showed off her personalised thank you note from the couple.
As Gardner read the letter, which was written on July 6, live on the Australian morning show, viewers were quick to spot the new cypher, which is designed in royal blue and sits central at the top of their new personalised stationery.
In case you missed it, the royal couple shared a sweet kiss at a polo match over the weekend.
The pair looked more in love than ever as they shared a smooch at charity sporting match, the Sentebale Polo Cup.
Prince Harry was in a celebratory mood after scoring two goals and winning the match for his charity, which is aimed at supporting young people with HIV and Aids in Lesotho.
Meghan watched fondly from the sidelines in a denim Carolina Herrera dress before congratulating her husband with a peck when the game finished.
Harry's good friend Nacho Figueras, the team captain, spoke out about the recently married couple.
'The Duchess is lovely and wonderful. I’m very happy for Harry. They are both lucky to have found each other and I am very excited about this new chapter in his life,' he told the Daily Mail.
'It was great that I got to play with Harry because we normally play against each other. Harry played great. They are very, very happy together.’
Kensington Palace also posted a photo from the event.
'Today The Duke of Sussex played in the @Sentebale Polo Cup, held each year to raise awareness and support for the charity — today’s match raised over £1million to support Sentebale’s vital work with young people affected by HIV in southern Africa,' they captioned.