Archie is seventh in line of the throne even though his parents stepped back from royal life.

Archie is Harry and Meghan's son who is seventh in line to the throne [Instagram/TheRoyalFamily] [Instagram/ElleGermany]

Prince Harry and Meghan Markle are celebrating their son, Archie’s first birthday, and his great-grandmother, Queen Elizabeth is sending her best wishes.

In a tweet posted on the official Twitter handle of the British royal family, the Queen celebrated her great-grandson with a cute photo and message to mark his first birthday.

Happy Birthday to Archie Mountbatten-Windsor who is celebrating his 1st birthday today! Balloon. Archie is The Queen’s eighth great-grandchild,” the tweet read.

Daily Mail says Harry and Meghan plan to treat Archie to an ‘organic, sugar-free cake’, a splash around in their pool and a video call with the Cambridge children as part of his birthday celebrations.

Harry and Meghan welcomed Archie in 2019.

The couple got married in 2018 at a star-studded wedding held in England.