Kate Middleton and Prince William likely to attend celebration of Queen Elizabeth II’s reign this month

People magazine wrote that William and Kate won’t travel alone as they will take their children, Prince George, 2, and Princess Charlotte, who turned 4 months today, at one of Queen Elizabeth II’s residences, the Balmoral Castle.

The publication added that the royal couple might show up at the celebration that will mark the moment Queen Elizabeth II becomes the longest-reigning monarch in British history on September 9, surpasing Queen Victoria’s reign of 63 years and 216 days.

The royal parents will likely be present at the castle that day for a celebration dinner.

“It’s a milestone day for the Queen, but for her it is ‘business as usual’ and she has her engagements during the day,” a royal source told People. “Any dinner will be treated like every other evening, and we won’t be briefing on who the Queen is having dinner with. That won’t change because of the significance of the day.”

Prince Charles and his wife Camilla, Duchess of Cornwall, won’t be present at Balmoral Castle for the event due to their royal engagements.

A recent report claimed that Kate and William would tour overseas next year and although the location is unknown, as any official statement in this regard has not been made yet, it has been rumored that the royal couple is set for a Caribbean tour.