Prince William attacked Prince Harry over marrying Meghan Markle.
In his new book, he revealed that Prince William physically attacked him.
The memoir is ready to be published on 10 January.
Prince Harry recalls the fight with his brother.
Prince William said about Meghan that she is rude, difficult, and abrasive.
He also claimed that Prince William grabbed his collar and knocked him to the floor.
According to The Guardian, Prince Harry wrote these details in his memoir.