Duchess of Cambridge may be having a girl

The biggest royal secret ever may have just become public knowledge.

The world is anxiously awaiting the arrival of the Royal baby that is due in July and to crave that anxiousness, everyone is watching the Duke and Duchess of Cambridge very carefully.

After a stint in the hospital for a case of acute morning sickness, Katherine Middleton is back on her royal duties.

Over the past few weeks the Duchess has been alongside Prince William to make appearances with that regal baby bump of hers.

Reported by The Telegraph, while visiting the Seaport of Grimsby yesterday, Kate received multiple gifts, including a teddy bear to which she responded "Thank you, I'll take that for my d…."

After realizing her slip up, the Duchess quickly cut herself off.

A woman standing next to Kate pressed the subject, asking, "You were going to say daughter, weren't you?"

The princess then responded with “No I don’t. We’re not telling,” according to E! Online.

The slip up might have been fun for the world to watch but the Duchess might not be too happy about it.