The magazine is to hit newstands Monday, but the cover was leaked by sources like The Huffington Post.
The cover of Star reads in bright, large, bold letters: "It's Official! Kate's Pregnant."
Star claims to have inside information about "top-secret" palace preparations, that Middleton is gaining "mommy weight and loves it" and touting "the baby name that shocked the Queen!"
They also have a picture of the Duchess of Cambridge wearing a dress that might have been too slim around the waist and whose seams are a little tight, Star points this as proof that Middleton is gaining weight due to a pregnancy.
But that's not the only reason people are speculating over her alleged pregnancy, when Prince William was asked how many children he would like to have while at a school visit he said "two."
"Someone asked him how many children he would like to have, and he said he was thinking about having two," student Corine Ackermann said during their visit to a school, according to The Associated Press.
William's comment ignited speculation that Middleton must be pregnant, even though the two aren't really correlated.
The most legitimate story comes from the New York Daily News who reported that Middleton was refusing wine at a state dinner and toasted with water.
Pictures revealed that the Duchess opted for water at the British Gala Reception on Thursday too, as noted by The Huffington Post.
Much of the public is antsy for the newlyweds to have a child, but are they cooperating?