Saturday night live is losing cast member vanessa bayer following this weekend's season finale. Bayer is finishing her seventh season with nbc's comedy institution, and her memorable impressions include miley cyrus, rachel from friends and jonah the bar mitzvah boy. She's been with the show longer than any other female cast member. Bayer, who's acted in movies recently including trainwreck, announced her departure on instagram saturday. Another veteran cast member, bobby moynihan, is leaving for a role on a cbs sitcom.