He accidentally let the cat out of the bag about the surprise party
She promised to keep it a secret, but she accidentally let the cat out of the bag
I was trying to keep it a secret, but my brother let the cat out of the bag
The news reporter let the cat out of the bag about the company's financial troubles
He didn't mean to let the cat out of the bag, but he did
Hey, did you hear about Sarah's surprise party?
Oh my gosh, no! Spill the tea – is it soon? Did someone **let the cat out of the bag** already?
Well, someone did let it slip about the general timeframe, but I'm sworn to secrecy! Wanna hear what the theme is going to be?
He finally let the cat out of the bag and revealed the surprise party
He revealed the secret about the party
The secret was finally disclosed by him