Archie Harrison Mountbatten-Windsor is to be christened on Saturday 6 July, exactly two months after the date of his birth, Buckingham Palace has confirmed.
The private ceremony is due to take place at the private chapel in Windsor Castle, the same castle where the Duke and Duchess of Sussex were wed on 19 May 2018.
Baby Archie Harrison's christening will be a small affair, attended by fewer than 25 people.
Following the ceremony, photographs will be released through the media and through Prince Harry and Meghan's official Instagram account.
The duke and duchess are yet to release a statement about the upcoming christening on social media.
However, on Sunday 16 June the couple shared a new photograph of their son in celebration of Father's Day.
"Happy Father's Day! And wishing a very special first Father's Day to the Duke of Sussex," the caption read.
Royal christenings are typically private occasions, attended by close family members, friends and godparents.
"That would be a bad idea," Clooney told American talk show host Jimmy Kimmel in May.
"I'm a father of twins and I can barely do that."
Prince Harry and Meghan's son will likely wear the Honiton christening gown for his christening, a gown that has been passed down the royal family.
The garment is a replica of the dress Queen Victoria commissioned for her first-born child, Victoria Adelaide Mary Louisa, and has been worn by all three of the Duke and Duchess of Cambridge's children.
On Monday 1 July, the Duke and Duchess of Sussex announced that they were marking the month of July on their Instagram account by highlighting environmental issues.
"There is a ticking clock to protect our planet – with climate change, the deterioration of our natural resources, endangered of sacred wildlife, the impact of plastics and microplastics, and fossil fuel emissions, we are jeopardising this beautiful place we call home – for ourselves and for future generations," the Instagram caption reads.
"Let's save it. Let's do out part."