Per theroyal family’s website, this includes Harry, who is fifth in the line of succession.
When he finally got a private audience with the queen, though, Harry was surprised by her response.
“It didn’t make any sense,” he wrote, perThe Telegraph.

“A grown man asking his grandmother for permission to marry.”
I have to get your authorization before asking for her hand."
The queen answered, “You have to do that?

Well then I suppose I have to say yes.”
The queen’s demeanor surprised Harry.
He recalled (via theMirror), “Was she being sarcastic?

Was she indulging in a bit of wordplay?”
Permission secured, Harry proposed to Meghan on the lawn of Kensington Palace.
“He’s down on one knee and I was just like, ‘Yes!’
Some of these requests were easier for Elizabeth to approve than others.
When her sister, Princess Margaret requested to marry Peter Townsend, the queen did not give permission.
This plan would have allowed Margaret to marry without royal permission.
The queen also had to balance public approval with Charles and Camilla’s relationship in the 1990s.