Harry was all smiles at the upscale event, but according to communications expert Louise Mahler, the senior members of the royal family gave him a chilly reception.
"Prince Harry arriving, I think we got our first glimpse of Harry for years," Louise spilled to a news outlet. "He was the old Harry, coming in smiling, laughing — walking tall and looking magnificent."
Harry seemed content as he entered the ancient Abbey, and was even spotted talking enthusiastically to junior royal family members Princess Beatrice and Princess Eugenie, along with their respective husbands Edoardo Mapelli Mozzi and Jack Brooksbank.
Body language expert Judi James noted that although he wasn't given front rows seats, he appeared happy-go-lucky while attempting to interact with relatives.
"Chatting first to Edo, he then got the attention of Eugenie and Jack and we saw an incredible return of the joker prince as Harry grinned and used two hands cupped widely under his stomach to do what looked like a mime of Eugenie's heavily-pregnant state."
Although it appeared the Duke of Sussex was back in form, not everyone seemed receptive to his charms. The prince did not interact with his father, stepmother, or any other senior royals apart from a brief exchange with Princess Anne. The California transplant managed to maintain a confident demeanor in spite of the puzzled and dismissive looks cast his way by the congregation.
"His striding walk looked jaunty as he pushed one side of his jacket away before making his way up the aisle nodding, grinning, using eye-brow flash rituals and chatting with people in the congregation as though signaling to the world that he was upbeat, confident and happy to be back," Judi said.
As The Royal Observer previously reported, royal expert Christopher Andersen speculated prior to the event that the 38-year-old would be "treated like something of a pariah."
"So, you have to give him credit for being willing to show up anyway," he added at the time. "There is a humiliation factor here."
The Mirror spoke with the communications and body language experts about Harry's demeanor at the coronation.