Prince Harry and Meghan Markle "quietly celebrated" his birthday together.

Prince Harry

Prince Harry

The flame-haired royal will turn 33 on September 15 and the couple marked the day ahead of time, just the two of them, as they can't be together on his actual birthday.

A source told E! News: "They quietly celebrated his birthday together on Saturday as she wouldn't be with him on the day of. Harry doesn't like to make a fuss of birthdays so he liked that it was just the two of them. Sometimes it doesn't have to be a huge thing with a group of friends."

It comes after rumours continue to swirl about the possibility of Harry and Meghan announcing their engagement.

And according to an insider, Prince Charles and his wife Duchess Camilla are keen for Harry to settle down.

A source said previously: "Harry's father is just keen for him to settle down and be happy. Both Charles and Camilla are understood to have held back from expressing views, keen that Harry should have his own space to make his own decision."

And Harry has said to have been delaying introducing Meghan to the other royals until he was convinced he has long-term future with the actress.

The insider shared: "Harry was nervous of introducing Meghan to them because he did not want people to jump to conclusions about someone he deeply cared for.

"He wanted to consider in his own time whether or not she might have a permanent place in his life."