During a meet-and-greet session with royal fans before the Coronation concert at Windsor last year, Catherine encountered an incident involving an overly enthusiastic American tourist.
As the fan leaned in for a selfie, they grabbed the Princess of Wales' hair in excitement, prompting a security guard to intervene swiftly.
Despite the interruption, Catherine remained composed, even smiling for a selfie with the fan after the security guard's intervention.
Following the photo, Catherine politely exchanged pleasantries with the fan, indicating her lack of alarm over the incident.
Visibly thrilled, the fan apologized to the security guard who intervened, expressing delight at the encounter. During the walkabout, Catherine also shared a touching moment by hugging a crying little girl.
Today's confirmation revealed Catherine's absence from the Trooping the Colour rehearsal due to her ongoing cancer treatment. As Colonel of the Irish Guards, she traditionally would have attended the Colonel's Review, the customary rehearsal preceding the main event, on June 8.