Prince Harry is set to honoured as a "Living Legend of Aviation", as critics have branded the royal "undeserving" of the award.
The Duke of Sussex will receive the honour at a star-studded Beverly Hills ceremony, hosted by John Travolta.
Prince Harry has been recognised for the award for his work in the military, completing two tours of Afghanistan.
He is also being honoured for his continued charity work with military veterans, with the work of the Invictus Games.
The royal will be given the "Living Legend of Aviation" award at a ceremony in Beverly Hills
PA
Retired military officer Colonel Richard Kemp told The Sun that there are "many others" who are "more deserving" of the honour than the Duke.
Other recipients of the Hall of Fame include renowned NASA Apollo astronaut, Buzz Aldrin.
Reacting to the news, Royal Biographer Angela Levin said the honour for the estranged royal was "ridiculous".
She revealed that a senior Navy personnel had called the move a "pathetic publicity stunt".
Levin told host Mark Dolan the Navy personnel was "quite right" in their remarks.
She said: "He [Harry] got quite good at flying helicopters, but he's not a brilliant man. His teacher said it's because he's rather dyslexic that he can do it.
"His job was to look down for anybody who he saw was wounded, they'd go down and take them up. Or if they saw any of the enemy, they would get rid of them."
Levin highlighted: "And we know from Spare that he got rid of 25. He shot them all. He boasted about that."
Angela Levin says the honour is a 'ridiculous' move for the Prince
GB News
Comparing the Duke's efforts to Apollo 11 hero Buzz Aldrin, Levin told GB News viewers that the honours "do not compare".
Levin fumed: "How you can compare him to people who landed on the moon and walked round the moon?"
Mark agreed, responding: "An unprecedented moment in human history, yes. But you don't think that the first man on the moon versus the short service in Afghanistan are comparable?"
Levin replied: "No. 20 weeks he was away doing it, and he was a companion in the plane. He wasn't there by himself, making all the decisions."