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

Sam Haysom

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

SEE ALSO: 69 times Ryan Reynolds was hands down the funniest actor on Twitter

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.

That caption game is truly A+.

Soon, commenters started wondering if Kendrick or Reynolds would respond. And sure enough, they didn't disappoint.

Image: instagram/blakelively

Image: instagram/blakelively

Excellent work all round.

Video: Watch the 'A Simple Favor' Teaser Here

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