Archie Harrison Mountbatten-Windsor, the youngest member of Britain's royal family, was christened at Windsor Castle on Saturday. Shown with him are his parents, Prince Harry and Meghan.

LONDON — The youngest member of Britain’s royal family, Archie Harrison Mountbatten-Windsor, was christened at Windsor Castle on Saturday in a private ceremony — too private for some royal fans.

The 2-month-old son of the Duke and Duchess of Sussex was baptized in the castle’s private chapel by Archbishop of Canterbury Justin Welby, head of the Church of England.

Palace officials said that, in keeping with royal tradition, Archie wore a lace and satin christening gown — a replica of one made for Queen Victoria’s eldest daughter in 1841 — that was also used for his cousins Prince George, Princess Charlotte and Prince Louis.

He was sprinkled with water from the River Jordan at an ornate silver baptismal font that has been used in royal christenings for more than 150 years.

Archie, born May 6, is the first child of Prince Harry and the former Meghan Markle, and seventh in line to the British throne.

Archie’s great-grandmother, Queen Elizabeth II, did not attend the christening because of a prior engagement.

Meghan and Harry have faced criticism for declining to reveal the names of Archie’s godparents, and not giving the public a glimpse of the event.