Based on her character on The Americans, it's unclear whether Annet Mahendru can be trusted.

But we're willing to take her word for now and confirm the following news:

The actress will guest star on an episode of Grey's Anatomy Season 11.

Annet Mahendru, whose KGB agent was sent back to Russia at the conclusion of The Americans Season 2 (maybe my favorite season of any series in 2014) broke the news herself via Twitter this morning.

Details on her role are unavailable at this time, but she's only expected to appear on one episode.

Mahendru earned a Critics Choice Award nomination this year for for her Americans‘ role and has previously guest-starred on White Collar, The Blacklist and 2 Broke Girls.

Grey’s Anatomy Season 11 Episode 1 gets bumped up an hour earlier and premiere on Thursday, September 25 at 8/7c.

Grey's Anatomy Cast: Before the Were Stars

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Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.