I'll let you in on a secret, my own private sin: I have no regrets.

But I'll let you in on a little secret, friend.

"Let you in on a little secret, Sam," she whispered, leaning toward him.

After a moment of consideration, she decided to let him in on a little personal secret that had finally stopped hurting.

Jackson let his audience in on a secret of how he deals with the old place when recruits visit.

Well, I'll let you in on a little secret: my first fianc.

I'll let you in on a big secret, something you'd never be told in an Earth school: reading is easy!

I want to let you in on a somewhat embarrassing secret, which is now a secret no longer!

I also want to let you in on a little secret, something that has not been announced yet.