Ryan Reynolds, Blake Lively and Anna Kendrick just had an A+ Instagram exchange

If ever you need an amusing social media exchange, you can normally count on Ryan Reynolds and Blake Lively to deliver.

They’ve done it before on Twitter, and now they’re at it on Instagram. And this time Anna Kendrick’s weighed in, too.

It started on Monday night, when Blake Lively shared a poster from her upcoming film A Simple Favor.

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