Prince Harry and Meghan Markle's royal wedding is already months behind us, so if you're going through withdrawal, you'll be relieved to know that another big event is almost upon us.

The HBO documentary "Queen of the World" is set to premiere soon, and it looks at the British royals as Queen Elizabeth II gets the younger members of the family to take on some of her responsibilities. The trailer was released Sept. 19, and it teases "unprecedented access" to the monarch. She, her grandsons William and Harry, and her new granddaughter-in-law, Meghan, Duchess of Sussex, all appear in the trailer, and they're joined in the documentary by even more royals. The list includes Prince Charles; Camilla, Duchess of Cornwall; Catherine, Duchess of Cambridge; and Sophie, Countess of Wessex.

Given the ongoing excitement about Harry and Meghan, it's not surprising that they have a prominent role in the preview. The prince is shown reassuring people that they shouldn't panic if they bump into the queen in the corridor, and the duchess discusses how the 53 countries in the Commonwealth will keep them busy.

Watch the full trailer below.

The big TV event is coming soon. "Queen of the World" debuts Monday, Oct. 1 at 8 p.m. ET/PT on HBO.