Photo Flash: Kathryn Gallagher Appears in Concert at the W

Kathryn Gallagher, star of Lifetime-turned-Netflix hit "You" and Broadway-bound "Jagged Little Pill," made her TodayTix Presents debut last night at the Living Room lounge at the W New York -- Times Square.

Her "You" co-stars Elizabeth Dean Lail and Nicole Kang cheered her on from the audience, along with Broadway pals Beanie Feldstein, Stephanie Styles, Bobby Conte Thornton and TodayTix Presents alum Ethan Slater.

On the heels of the announcement of "Jagged Little Pill" heading to Broadway, Gallagher celebrated the news with the intimate crowd, inviting the audience to sing along to "You Learn." In her acoustic set, Gallagher -- a seasoned songwriter herself -- debuted new music she's written, along with revisiting a few of her classic hits, including "American Spirit" and "I Wanna Wear a Dress." Cellist Jacob Yates also joined her for a few songs, including her take on "She Used to Be Mine" from "Waitress." After the audience cheered for a third encore, Gallagher gave an impromptu performance of a stripped down, electric guitar version of Britney Spears' "Baby One More Time."

Photo Credit: Jenny Anderson