The Princess of Wales hit the stage to rehearse ahead of the second annual Earthshot Prize Awards. A behind-the-scenes photo of Catherine walking on to the stage during a rehearsal at Boston’s MGM Music Hall at Fenway on Dec. 1 was released on Friday.

©Chris Jackson

Like last year, the royal mom of three will be announcing one of the five winners at the ceremony on Dec. 2. This year’s presenters also include Oscar winner Rami Malek, Emmy winner Catherine O’Hara and Big Little Lies star Shailene Woodley.

A black-and-white image of Prince William smiling at the rehearsal was also shared on Friday. Photographer Chris Jacksoncaptioned the photo of the heir to the British throne, “The Prince of Wales helps make final preparations for tonight’s @earthshotprize at a rehearsal yesterday. The prize uncovers and scales innovative solutions that will repair our planet within the next 10 years. Every year for the decade five solutions are awarded £1million and given the honour of being one of over 50 winners of the prestigious award. It’s going to be quite the show!! 🌍.”

The Royal Foundation and Prince William launched The Earthshot Prize, a prestigious global prize for the environment, in 2020. The inaugural Earthshot Prize Awards took place in London in October 2021. The second annual awards ceremony is being filmed on Friday, Dec. 2.

The Prince and Princess of Wales traveled to Boston for the ceremony. The trip marks the royal couple’s first visit to the United States since 2014. The awards ceremony will be the final engagement of William and Catherine’s trip to Boston.