"Harry has got approval from the Queen to propose to Meghan, he's already had those conversations with Her Majesty", the unnamed source said. "An engagement is imminent", a source dished.
That's because the Duke and Duchess of Cambridge, along with Prince George and Princess Charlotte, and Prince Harry and Meghan Markle are all expected to be there.
"Harry has always had a good relationship with the Queen and they are an extremely close-knit family".
It has only been almost two weeks since Prince Harry and girlfriend Meghan Markle made their first public appearance as a couple, but several speculations have already suggested that an engagement announcement could be imminent.
Prince Harry and Meghan Markle started dating previous year after meeting at the official countdown to Invictus 2017 in Toronto.
The Los Angeles-born star has been dating Prince Harry for around 10 months and the pair have taken turns to jet out to see each other in the UK, US and Canada.
Markle was a picture of a proud girlfriend last May 6, Saturday, which saw Queen Elizabeth II's grandson play polo at the Coworth Park Polo Club in Ascot, England.
Meghan has reportedly gotten closer to Harry's brother, Prince William, and wife Kate Middleton, as well. Meghan may even be moving into Harry's place in Kensington Palace later this year!
So far Prince Harry has made no indications that he plans on proposing to Meghan Markle, although many royal insiders believe that it might happen sooner rather than later.
In more signs that the couple is on the path down the aisle; Meghan shut down her successful lifestyle blog, The Tig, has gone almost radio silent on social media from her once very active updates and it rumoured to be quitting acting as soon as her contract is over. Share your thoughts in the comments section below!