Meghan Markle and Prince Harry managed to keep their relationship secret for about six months, during which time they had been on holiday and said “I love you”.
However when the news finally broke, they were nervous about the attention they knew was inevitable, as experts and fans analysed every little detail.
Looking back, there were lots of little hints about their blossoming romance, including matching bracelets which can be spotted in Instagram snaps.
However an Instagram post Meghan shares shortly after getting home from her first solo date with her future husband gave us the biggest clue – even though we had no idea at the time.
She shared a snap of a Love Heart sweet with the message Kiss Me written on it. Her caption said: “Love hearts in #London”.
And according to a new book about the couple, Finding Freedom, it worked a treat and the couple enjoyed their third date the following evening.
Authors Omid Scobie and Carolyn Durand write: “Whether it had meaning to anyone else, Harry got the message.”
Unlike their first two meetings, which took place at private members club Soho House’s Dean Street Townhouse, their third meeting took place at Kensington Palace.
Meghan took a cab to the London royal property, in which Harry had a small two-bed – Nottingham Cottage.
Scobie and Durand write: “The next night, Meghan left her hotel and got into a taxi like any ordinary citizen. Except as the cab wound through London’s dark streets, it had no ordinary destination: Kensington Palace.
“The car pulled off the main road and drove up the private Palace Avenue that took Meghan to an industrial-looking security gate and guard’s office that was a far cry from the palace gates she had imagined.”
She was then met by a protection officer and made her way to Harry’s home.
They continue: “When Harry opened the door, the prince towered in the small hallway with lots of coats hung on hooks and his boots by the door, just like any regular home.”
The book also claims that Meghan and Harry got engaged in secret two months before they said they did.
During their engagement interview, they told the BBC’s Mishal Husain Harry popped the question while they cooked chicken at home in November 2017.
Meghan said it was “sweet, natural and very romantic” and just a “standard typical night in” for the pair.
However the book claims the special moment actually happened while they were on holiday together in Botswana.