Three months after Prince William and his wife Kate showed off their new baby to the world, Prince George of Cambridge is set to make his second official appearance at his christening on Wednesday.

The third-in-line to the British throne, after Prince Charles and Prince William, will be baptised at the Chapel Royal at St. James’ Palace by Archbishop of Canterbury Justin Welby, the spiritual leader of the Church of England.

The royal couple decided to make the baptism as low-key as possible. They decided to break with tradition and not hold the service at Buckingham Palace, where previous royal christenings have been performed.

CTV News Royal Commentator Richard Berthelsen said the decision to hold the ceremony at St. James' Palace is a “return to an older tradition." 

The palace “has been the setting for some of the most important events in Royal history,” according to the official website of the British Monarchy.

“I think it’s going to be a very private occasion, people are certainly looking forward to it, but how much they’re actually going to see it, I think that remains to be seen -- it’s in a very small chapel, it only has seating for about 60,” Berthelsen told CTV News Channel Sunday. “I don’t think we’ve ever had a televised ceremony from that particular place.

“I think it’s been chosen quite deliberately to make it low-key and private. And we’re going to see some very interesting announcements made on the day,” he added.

British media have begun speculating on the guest list and the baby prince’s attire. The gathering is expected to be small, with Prince George’s grandparents in attendance. The prince will be christened in a replica of a lace gown worn by Queen Victoria’s daughter in 1841, according to The Mirror.

“It’s really an homage to a lot of the traditions that were created in the Victorian era,” Berthelsen said.

So far, official photographs of the infant have only been taken by Michael Middleton, Kate’s father.

But award-winning photographer Jason Bell, whose photographs have appeared in Vogue and Vanity Fair, is expected to take the official pictures of the prince during his baptism, according to The Telegraph.

As for the prince’s godparents, Berthelsen speculates the royal couple will choose friends and close relatives to fill the role. “I think we’re moving away from an era where there was sometimes dynastic considerations in the godparents, or an entire royal family list – I think we’re going to see some people who are friends of both William and Catherine.”

Royal fans will also be able to see four generations of the Royal Family photographed together for the first time in over 100 years. A photograph of Queen Elizabeth, Prince Charles, Prince William and Prince George is expected to be released following the ceremony.