A royal moment of affection stole the spotlight at the Commonwealth Day Service as the Prince and Princess of Wales shared a candid exchange, sparking excitement among fans.

Prince William and Princess Catherine appeared in high spirits during the Commonwealth Day Service, sharing lighthearted moments that caught public attention.

As seen in images from the event, the royal couple exchanged smiles and laughter, exuding a relaxed and joyful demeanor.

Prince William and Princess Catherine attend the annual Commonwealth Day service ceremony at Westminster Abbey in London, on March 10, 2025 | Source: Getty Images

A short video shared on TikTok by Daily Mail Royals captured Prince William whispering something to Princess Catherine, prompting her to smile instantly.

Another post on X highlighted a similar interaction, with a fan describing it as “flirting in public.” His playful gesture visibly delighted Catherine as they stood among other attendees.

The Prince and Princess of Wales are pictured smiling during their presence at the annual Commonwealth Day service ceremony at Westminster Abbey in London, on March 10, 2025 | Source: Getty Images

Body language expert Judi James provided insight into their interactions, noting a shift in their usual dynamic. Speaking to Mirror, she explained, “William and Kate made the body language transition from ‘unison’ behaviours to mirrored, ‘free movement’ behaviours at this formal royal event.”

James observed that following Catherine’s illness, the couple had been “extra tactile and totally connected” in their recent public appearances, often using “touches, glances or mimed hugs to move together coupled up like ice skaters or ballroom dancers.”

William, Prince of Wales, and Catherine, Princess of Wales are pictured arriving at the annual Commonwealth Day Service of Celebration at Westminster Abbey on March 10, 2025, in London, England | Source: Getty Images

However, during this event, they adopted a more traditional regal stance while still moving in “synchronised, mirrored unity.”

She further explained that their behavior suggested a “more relaxed approach with no need to check or employ tie-signs,” signaling that they were in strong form for the occasion. While they entered the event slightly apart, their body language reflected “renewed energy and positivity.”

Kate Middleton and Prince William are seen arriving at the celebrations for Commonwealth Day on March 10, 2025, in London, England | Source: Getty Images

James also analyzed the Prince of Wales’ expressions, stating, “William’s beaming smile projected ongoing pride in his wife,” while noting that he avoided the usual “steering pats and touches that can imply she has some need of support and encouragement.”

Prince William and Princess Catherine attend the 2025 Commonwealth Day Service at Westminster Abbey on March 10, 2025, in London, England | Source: Getty Images

She described his “body-scrunched pose and his very youthful smile with eye crinkling and a peek of the front teeth through his lips in response to Kate’s lean and playful smile,” suggesting “a bit of a bashful crush is still going on in their relationship.”

The Prince and Princess of Wales smile during their presence at the annual Commonwealth Day service ceremony at Westminster Abbey in London, on March 10, 2025 | Source: Getty Images