The Prince of Wales and actor Danny Dyer had an unlikely "family reunion" when the pair met at the Prince's Trust Awards in London.
Meeting Charles before the awards at the London Palladium on Wednesday, Dyer told him: "I'm in EastEnders. Just wanted to let you know we're related as well. King Edward III is my grandfather – but I won't go into it. No he is, on my life."
The prince replied: "A very long way away."
"Yeah, I know, I know," said Dyer.
The EastEnders star discovered in 2016 that he is related to Thomas Cromwell, Edward III, William the Conqueror and Henry III during filming for Who Do You Think You Are?
In January this year he charted his regal lineage in a two-part BBC One series called Danny Dyer's Right Royal Family.
On stage later, the actor joked the two were having a "family reunion" at the event, where he had come to present the Prince's Trust Mentor of the Year award.
"When your cousin Charlie makes the call, you've got to help your family out, you know what I mean?" he said.
Speaking on stage with Charles, Dyer joked that his reference to their relationship went over the prince's head, saying it went "straight up his nut".
Host Kate Garraway told Dyer: "I'm not sure you'll be coming over."
Charles also compared notes on fatherhood with Tinie Tempah at the event, as the pair discussed the recent birth of the rapper's first child.
"Does she keep you up at night?" Charles asked Tempah.
"No, she's very good," he replied.
(Left to right) Danny Dyer, Jamie Foxx, Graham Norton, Cameron Diaz and Usher during filming of the Graham Norton Show at the London Studios, in London.
The Prince of Wales with Danny Dyer (right) and winner of Mentor of the Year Award Rahul Mehra onstage at the annual Prince's Trust Awards at the London Palladium.
Danny Dyer with the award for best Serial Drama Performance in the Press Room at the National Television Awards 2019 held at the O2 Arena, London. Photo credit should read: Doug Peters/EMPICS
Danny Dyer and Joanne Mas attending the Cirque Du Soleil Totem premiere at the Royal Albert Hall, London. Photo credit should read: Doug Peters/EMPICS
Danny Dyer and Dani Dyer on stage during a photocall on the opening night of Nativity at the Hammersmith Apollo, Hammersmith - London. Picture date: Wednesday 19th December 2018. Photo credit should read: David Jensen/EMPICS Entertainment
Danny Dyer, Dani Dyer and Jack Fincham attending the TV Choice Awards 2018 held at The Dorchester, Park Lane, London. Picture credit should read: Doug Peters/EMPICS
Danny Dyer with Lacey Turner in the press room who won the Best Serial Drama Performance Award for her role as Stacey Slater in Eastenders at the National Television Awards 2017, held at The O2 Arena, London. PRESS ASSOCIATION Photo. Picture date: 25th January, 2017. See PA Story SHOWBIZ NTAs. Photo credit should read: Ian West/PA Wire
Danny Dyer and his daughter Sunnie after completing the Sainsburyâs Sport Relief Mile during the Sainsburyâs Sport Relief Games, at The Queen Elizabeth Olympic Park, Stratford, London.
(Left to right) June Brown, Jessie Wallace, John Altman, Jane Slaughter, Danny Dyer, Pam St Clement, Graham Norton, Letitia Dean, Kellie Bright and Adam Woodyatt during filming of a special episode of the Graham Norton Show to celebrate 30 years of EastEnders, at the London Studios, south London, which will be aired on Monday 16th February.
Kellie Bright, Maddy Hill and Danny Dyer during the 2015 National Television Awards at the O2 Arena, London.
(l-r) Sam Strike, Maddy Hill, Danny Dyer, Kellie Bright and Danny Boy Hatchard attending the Inside Soap Awards at DSTRKT, London.
Danny Dyer (right) arrives with her father Danny Dyer (left) for a screening of 'We Still Kill Them The Old Way' at Ham Yard Hotel, Soho, London.
(left to right), Danny Dyer, Kellie Bright, Sam Strike, Maddy Hill, Jessie Wallace and Shane Richie arriving on a London Red Bus for the 2014 National Television Awards at the O2 Arena, London.
Tamer Hassan and Danny Dyer attending the world premiere of 'Deviation' at Odeon Cinema in Covent Garden, London.
Rhys Ifans (right) and Danny Dyer arriving for the Mr Nice UK Premiere, at Cineworld Cinemas, 63-65 Haymarket, London.
Danny Dyer and daughters Dani Dyer and Sunnie Dyer arrive at the Twilight Saga Eclipse Premiere at the Odeon, Leicester Square, London.
Actor Danny Dyer is held in a neck lock by Sergeant Richard Harley, Physical Training Instructor with the Royal Marines, during weapons and combat training in Cobham, Kent, in preparation for the filming of a World War II movie, Age of Heroes.
Danny Dyer arriving for the Daily Mirror's Pride Of Britain Awards 2009 at the Grosvenor House Hotel in central London.
Omid Djalili and Danny Dyer take part in the Celebrity Soccer Six charity football match at Chelsea Football Club
Danny Dyer and Jodie Harsh attending the Spring Fling launch party for the new Sony NWZ-A820 Walkman Video MP3, at Reliance Square, Shorditch, east London.
Danny Dyer arriving at the premiere of High School Musical 2 at the Vue Cinema at the O2 Dome, London.
Danny Dyer and family attend the launch of the London Dungeon Extremis: Drop Ride to Doom attraction at the London Dungeons in south London.
Danny Dyer (left) and Sean Bean arrive for the First Light Film Awards 2007 at the Odeon Cinema in Leicester Square, central London.
Pop group member Simon Webbe and actor Danny Dyer at the Sky One champagne reception prior to the Mastercard FIFPro World XI Player Awards 2005
Actors Will Mellor (left) and Danny Dyer arriving for the gala premiere of the film xXx at the Odeon Leicester Square cinema, London.
Stars of the film 'Mean Machine' (from left) Danny Dyer, Vinnie Jones and Vaz Blackwood during a photocall at Stamford Bridge, London, to promote the film.
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Speaking after the conversation, Tempah told reporters: "He was very happy to hear that I have a daughter.
"He didn't offer any advice but he was happy to hear she had been born."
Tempah, whose real name is Patrick Okogwu, has been private about the birth of his daughter late last year and his relationship with her mother.
He has said he prefers to keep the identity of his partner and child a secret.