May 6 (UPI) -- Members of Britain's royal family, including Queen Elizabeth II, wished Archie Harrison Mountbatten-Windsor a happy birthday on social media.
"Wishing Archie Mountbatten-Windsor a very happy 2nd birthday today," Queen Elizabeth's royal family Twitter account said about her great-grandson alongside a photo of Harry holding his son next to Markle.
"Happy birthday to Archie, who turns two today," Prince Charles and Camilla, Duchess of Cornwall said about their grandson on Twitter alongside a black and white photo of Charles with Harry and Archie.
Archie, Queen Elizabeth's eighth great-grandchild, is seventh in line to the throne and does not have a title.
Harry and Markle announced in February that they are expecting their second child together. The pair have stepped down from their duties as senior members of the royal family and reside in California.
William and Middleton launched a YouTube channel on Wednesday and uploaded a welcoming video that highlighted their work as members of the royal family.