Five-year-oldCharlottelikes being a princess.

But now he’s seven; he may well have moved on (viaPeople).

Now, sources have toldUS WeeklythatWilliam and Kateare looking to welcome a fifth member into their growing royal household.

Kate Middelton and Prince William, in love

The Queen is said to be “overjoyed.”

Prince William, meanwhile, took some convincing.

“He said that three children is more than enough,” according to the magazine’s source.

William, Kate, and their kids at Louis' baptism

The Duchess of Cambridge is aware she may not be able to have children for much longer.

She feels ready to start trying again," a source toldUS Weekly.

Part of the reason that Kate is anxious for a fourth child has to do with Princess Charlotte.

We’d be lying if we said we weren’t worried about one thing: the cake.

More specifically, the cake that would be served at a potential fourth child’s christening ceremony.

Which would make it almost a decade old, today.

Can it possibly survive long enough for baby number four?