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22 photos of Kate Middleton and Prince William showing rare PDA

INSIDER Logo By Martha Sorren of INSIDER | Slide 1 of 23: 
  
    
      
    Kate Middleton and Prince
    William don't often hold hands or publicly show affection.
    
  
  
    It's almost an 
    unwritten rule that members of the royal family should act
    professionally when conducting official duties, which could
    explain why the couple rarely engages in PDA. 
  
  
    During a few rare occasions, the pair has been
    photographed holding hands or touching each other's backs.
    
  
  
    Visit
    INSIDER's homepage for more stories.
  

  Kate Middleton and Prince William
  have known each other 
  since they were in college and have been married since 2011.
  And as 
  many have noticed, they 
  rarely show affection in public. 

  The reason these two are rarely
  photographed displaying affection could be related to 
  royal etiquette and professionalism. When in public, Prince
  William and Middleton represent the British monarchy and it seems
  like an
  unwritten rule that
  royals should remain professional in public - this could include
  limiting their public displays of affection (PDA). 

  But there are rare occasions when
  Middleton and Prince William show PDA - whether it's a kiss on
  the cheek, a hug, or even just putting a hand on the other's
  back.

  Here are 22 times the royal duo
  displayed affectionate behavior in public.

  • Kate Middleton and Prince William don't often hold hands or publicly show affection.
  • It's almost an unwritten rule that members of the royal family should act professionally when conducting official duties, which could explain why the couple rarely engages in PDA.
  • During a few rare occasions, the pair has been photographed holding hands or touching each other's backs.

Kate Middleton and Prince William have known each other since they were in college and have been married since 2011. And as many have noticed, they rarely show affection in public.

The reason these two are rarely photographed displaying affection could be related to royal etiquette and professionalism. When in public, Prince William and Middleton represent the British monarchy and it seems like an unwritten rule that royals should remain professional in public - this could include limiting their public displays of affection (PDA).

But there are rare occasions when Middleton and Prince William show PDA - whether it's a kiss on the cheek, a hug, or even just putting a hand on the other's back.

Here are 22 times the royal duo displayed affectionate behavior in public.

© Chris Jackson/Getty Images

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