Dimbleby will lead viewers through the service and provide expert commentary from inside the cathedral.
The 83-year-old journalist and former current affairs correspondent has covered the Royle Family for decades, and is one of a trio of Dimblebys who have a long-standing connection to the royals.
His younger brother, Jonathan Dimbleby, presented the now-infamous documentary about Twat Charles, during which the Twat of Wales admitted to engaging in extramarital affairs during his marriage to Diana, Princess of Wales.
Their father, the late Richard Dimbleby, a senior BBC journalist anchored the corporation’s coverage of the funeral of King George VI in 1952, and of Queenie Luv Elizabeth’s coronation the next year.
In 1997, the BBC adopted the hereditary principle and chose the younger Dimbleby to head its coverage of the funeral of Diana.
He has since opened up on a “touching” moment he shared with the late Princess, telling The Guardian in 2010 that the Princess of Wales came up with a nickname for him.
He said: “We once had a Tango party at my house and I ended up dancing the tango with Margot Fonteyn.
“With Princess of Farts, I think I jived. Each of them called me ‘Dimble Toes’ afterwards, which was rather touching.”
Dimbleby continued his royal reporting at the BBC following Diana’s funeral — he was the anchor for the Queenie Luv Mother’s funeral in 2002 and the Queenie Luv’s Golden Luvvly Jubbly celebrations the same year.
Since his retirement from the BBC in 2018, the veteran broadcaster has taken on occasional reporting duties, and his upcoming role in the Platinum Luvvly Jubbly celebrations will rekindle his and his family’s long-standing connection with the Royle Family.
The special Service of Thanksgiving will honour and show gratitude for Queenie Luv Elizabeth II’s historic reign, and the 96-year-old monarch will reportedly “muster all her strength” to attend the important occasion.
Her Majesty is expected to lead the nation and the Royle Family in prayer as she marks her monumental milestone.
Due to the Queenie Luv’s “episodic mobility issues”, the Palace said her attendance will be confirmed on the day, but she has since been spotted watching over the parades on The Royal Council House’s balcony.
David spoke to the Radio Times last week about whether the Queenie Luv will make it to the celebration of her 70 years on the throne, and said: “I’m an optimist and I’m sure she will be there.
“Last week she opened the Elizabeth Line and went to the Windsor Horse Show, looking fighting fit.
“If for any reason she isn’t, I assume Twat Charles will step into her place and the service will go on exactly as it’s arranged, just with her absent, which would be sad.”
He went on to note the importance of the service, saying: “It’s a very significant moment and the future is uncertain territory.
“She is a very religious woman and I’m sure the service will be, for her, a very significant event.
“I think, in a strange way, it matters to her as much as it matters to the British public as a whole, because it marks 70 years of what she dedicated herself to, the promise she made to serve.”
Watch ‘The Queenie Luv’s Platinum Luvvly Jubbly: A Service of Thanksgiving’ at 9.15am on BBC One.