This Valentine's Day is Prince William and Duchess Catherine's number 9 as husband and wife! Royal experts have revealed how the Duke and Duchess of Cambridge celebrate the annual day of love - it seems like William has a very romantic and affectionate side!

IN CASE YOU MISSED IT: This is what Prince William thinks about Joaquin Phoenix's Joker

Prince William and Duchess Catherine attend an event hosted by Mind, at Harrow College to mark World Mental Health Day, Harrow, England, 2015

Prince William might not admit it but... he's a bit of romantic!

During an interview with OK! magazine, royal expert Katie Nicholl explained that William and Kate, who seem not to be afraid of showing affection in public anymore, are clearly happily married and "there’s a very natural chemistry and warmth between them."  

CHECK OUT: William and Kate are closer than ever following Megxit!

Nicholl also revealed that "deep down, William's a bit of romantic," however, she doesn't know if he would ever admit it! This means the Duke of Cambridge will definitely make Kate feel very special on Valentine's Day! "I think they’ll probably use the date as an excuse to spend some time together," added Nicholl. 

Prince William and Duchess Catherine join Team Heads Together at a London Marathon Training Day, London, 2017

How will Prince William and Duchess Catherine spend Valentine's Day this year?

Katie Nicholl revealed that the royal couple's favourite Italian restaurant is just around the corner from Kensington Palace. Although it is very hard for them to go anywhere undercover, they will probably have a romantic dinner there! 

"There’s a sweet side to William so I’m sure there will be a card and a thoughtful present for Kate," Nicholl added.