Prince Harry made an awkward "ignore" gesture as he got first glimpse of Prince William at the Coronation, an expert has claimed.
Today's historic crowning of Charles and Queen Camilla marks the first time Harry has been in a public setting with his royal relatives since he criticised many of them in his memoir, Spare, which was published in January.
It included claims that William physically attacked him - and it is believed that the feuding brothers have no exchanged any word since the bombshell book hit shelves.
Today, Harry turned up at Westminster Abbey for the service after previously announcing he would be attending the historic event without wife Meghan Markle, who has stayed behind in the US with their children Prince Archie and Princess Lilibet.
The Duke of Sussex took his seat in the third row for the coronation of his father the King, two rows behind his brother. .
Wearing medals pinned to his suit jacket, chatted to his cousin Princess Beatrice and her husband Edoardo Mapelli Mozzi as he entered Westminster Abbey on Saturday in the drizzling rain.
But as William and Kate proceeded to their seats, Harry caught sight of his brother, and according to body language expert Judi James, he performed an "ignore" gesture.
She told the Mirror: "Harry performed what looked like an oddly-times act of ignore or attention diversion as his father, brother and sister-in-law walked in a procession in front of him.
"Harry had been chatting animatedly to Edoardo, jerking a thumb over his shoulder at one point, sharing a giggling laugh that seemed to involve his tongue placed between his teeth, and then doing a mutual, mirrored eye gaze with a matching lip clamp smile to Edo that seemed to signal mutual sympathy or empathy.
"Harry was looking up as Charles, William and Kate arrived to walk past but after looking at his father, Harry turned his head to speak to Eduardo again in a very odd way at a crucial point in the ceremony when all eyes and attention were on Charles and William's arrival."
It is not believed that there will be any further chat later between the brothers later as Harry won't be hanging around after the Coronation service.
An insider claimed Harry will be "in and out of the UK in 24 hours" and that he won't attend the Coronation Concert at Windsor Castle tomorrow night either so he can get back to son Archie, who turns four today.
The ceremony is expected to end at 1pm today so it is believed that the Duke could head to the airport straight after, possibly leaving the country at around 2pm or 3pm.
Earlier this month, a royal source told The Mirror: "After much back and forth, Harry said that he would be returning for the King's Coronation but it will only be a fleeting visit.
"Organisers have been told Harry won't be attending the concert with the rest of the Royal Family, which is a great shame as it will be such a spectacular event."
After Harry confirmed he would attend the Coronation, an insider said King Charles was "delighted" despite their rocky bond.
The source said: "The King has previously spoken of loving both his sons and that remains the case.
"Harry would have deeply regretted not attending the ceremony.
"Archie's birthday has provided the perfect excuse for Meghan to stay behind and, with all things considered, it's probably the right thing to do."