Kate Middleton 's Trooping the Colour appearance came amid a challenging time for the Princess of Wales. Following Kate's stunning showing at King Charles III 's birthday parade, ET spoke with royal expert Katie Nicholl about how the public display affected Prince William 's wife amid her cancer treatment . "The princess has this sort of swan-like quality about her -- she's sort of gliding on the surface -- but beneath the water, I think often she's paddling quite frantically," Nicholl told ET.
"I can only imagine that a huge amount of preparation and time and effort and energy will have gone into Saturday's appearance." "She was on her feet for a long period of time," she continued. "There was a moment where she was watching the parade.
.. and was offered a seat, which she gratefully accepted.
That's just a bit of an acknowledgement that she is not as strong, not as fit, as she was before she went into this treatment." Even amid her health challenges, Nicholl noted that Kate "looked impeccable" at the royal event, adding, "If you didn't know that she was going through cancer treatment, you would never have guessed." "I think a day like Saturday, where she knows the eyes of the world are on her, there is a huge amount of scrutiny that will take its toll," she said.
"I think we can probably imagine that she probably had a long and well deserved rest afterwards. I don't think we can expect to see her in public for a little while. That's going to take some recovery from.
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