Prince William is second in line to the throne, after his father, Prince Charles.
Third in line is William's brother, Prince Henry.
However, it is unlikely that Henry will become King because William's children will come before Henry in the line of succession: first the male children, oldest to youngest; followed by the female children, oldest to youngest.
Unless William passes away with no children (and assuming his wife is not pregnant with the heir, in which case the heir would be king/queen and a regent would reign for him/her until he/she comes of age) the next on the throne after William will be William's eldest son, or his eldest daughter if he has no sons.
See the related question link below.
Prince George will be the successor to the throne.
Brian Williams
Prince Williams favorite Drink is Hot Tea, or Guinness and Diet Pepsi Prince Williams favorite food is Banana Flan Prince Williams favorite book is Fledgling Jason Steed Prince Williams favorite music band is the Beatles Prince Williams favorite TV show is Top Gear
Prince Williams favorite animal is a Horse.Prince Williams favorite film is 'The Italian Job'Prince Williams favorite book is the Jason Steed Seriesby Mark A. Cooper.Prince Williams favorite Music is 'The Beatles'Prince Williams favorite food is 'Banana Flan'.Prince Williams favorite Tv show 'Top Gear'.
The nationality of Prince Williams wife, Kate, is British.
It would be my pleasure to demonstrate the usage of the word 'successor'. Who will be Barack Obama's successor? Has Prince Harry been eligible to be successor to the throne since birth?
Prince Williams favorite person hie Kate Middleton or his mum
Williams last name came from Prince Williams
If you mean "successor", it will be Prince Charles.
yes prince william is the youngerst
Prince Charles and lady Diana
a boy considering he is a prince.