Britain’s royal family sent birthday messages to Archie, the son of the Duke and Duchess of Sussex who unwittingly became the centre of one of the family’s biggest crises in decades earlier this year, as the toddler turned two on Thursday.

Archie Mountbatten-Windsor, the seventh in line to the British throne, was born at London’s Portland Hospital in May 2019 and now lives with his parents in Los Angeles after they left Britain and stepped away from their royal duties last year.

“Wishing Archie Mountbatten-Windsor a very happy second birthday today,” said a message posted on Queen Elizabeth’s Twitter account, with similar good wishes following from Archie’s grandfather, heir-to-the-throne Prince Charles, and his uncle and aunt, the Duke and Duchess of Cambridge...