let in on

1. Allow someone to know about or participate in something, as in I'm going to let you in on a little secret. This idiom was first recorded in 1904.

Example Sentences

Watching them was like dining with the ladies who lunch and being immediately let in on all the loosely kept secrets of New York society, traded like currency to keep climbing a ladder that never ends.

Read more on Salon

And so within that desire to write this movie in the first place comes a structure where you drop the audience into a match and gradually they get let in on the secret of why this thing matters so much.

Read more on Los Angeles Times

After Gladden was let in on the joke in the finale, and headed back home to San Diego, Marsden called him to see how he was holding up.

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But South Korean officials will be let in on intelligence about North Korean nuclear threats—and on details of U.S. nuclear war plans.

Read more on Slate

Some frustrations and concerns about the positions have been expressed by students, who want to be let in on policymaking discussions earlier in the process, as well as from district staff, who say the board gave students an opportunity that wasn’t fully thought out.

Read more on Seattle Times

Related Words

• advise 
• announce 
• confess 
• declare 
• disclose 
• explain 
• express 
• inform 
• instruct 
• mention 
• notify 
• order 
• report 
• reveal 
• say 
• speak 
• state 
• summon