After months of speculation, we're getting a picture of who will and won't be attending Prince Harry and Meghan Markle's wedding.

Prince Harry and Meghan Markle have invited 600 guests to witness the wedding ceremony at St. George's Chapel in Windsor, England on May 19. While the whole guest list hasn't been released we've got some confirmation on who is and isn’t attending.

The castle chapel can accommodate approximately half the number of people who witnessed Prince William and the Duchess of Cambridge’s nuptials and roughly one-fifth the number of Diana, the Princess of Wales, and Prince Charles’ guests.

Kensington Palace said the focus for the wedding was to have friends and family members attending – rather than politicians and world leaders.

U.S. President Donald Trump, as well as former U.S. President Barack Obama weren't invited. On the Canadian side, a spokesperson for Prime Minister Justin Trudeau and his wife Sophie Gregoire Trudeau acknowledged the couple wouldn't be attending the royal nuptials.

But the wedding will have at least one Canadian attending.

A fifteen-year-old southern Ontario girl has scored an invitation due to her charity work. Faith Dickinson earned the spot for her affiliation with The Diana Award, a mentoring program named after Prince Harry's mother Diana, Princess of Wales.

Dickinson launched her charity at age nine after her aunt was diagnosed with breast cancer and complained of being cold during treatment.

The then-nine-year-old knitted her first blanket and took it from there.

Since then, the teenager has made more than 3,000 blankets, each personalized with details about the recipient's hobbies or their favourite colour.

Markle’s close friend and stylist Jessica Mulroney, wife of CTV Your Morning’s Ben Mulroney, is also expected to attend but won't be the maid of honour – after Kensington Palace revealed no one would fill that role.

The wedding is due to take place on May 19.