The Twilight and Pitch Perfect actress revealed that seeing the Gangster Squad heartthrob in all his glory had driven her to "inappropriate" behaviour.
"Ugh - NEVER going to a Ryan Gosling movie in a theater again," she wrote. "Apparently masturbating in the back row is still considered 'inappropriate'."
Kendrick's saucy claim has caused quite a stir on Twitter, receiving almost 20,000 retweets and more than 17,000 favourites so far.
The actors have both been repeatedly rumoured for a part in the upcoming Fifty Shades of Grey movie, based on the E L James erotic novel of the same name.
Ryan Gosling in Gangster Squad
Gosling recently described his sex-symbol status as a "cosmic joke", stating: "I'm as uncomfortable with the whole thing as I could possibly be."
Watch Digital Spy chat to Ryan Gosling about Gangster Squad below:
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