File this under things that will never happen: A Kate Middleton and Prince William sex tape!

But Vivid Entertainment, the world's leading distributor of celebrity sex tapes, is dreaming big, announcing Dec. 30 that the royal couple top the 2014 list of celebrity twosome they'd like to see star in an X-rated film.  

Kate, 31, and William, also 31, have actually been Vivid Entertainment's top choice to make a celebrity sex tape for the past three years. Steven Hirsch, the company's founder/co-chairman, said in a statement that in the past year, "Kate's pregnancy and birth to Prince George only made the couple more popular," explaining, "They project natural good looks and good health and their stature on the world stage is unparalleled."

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