Groff, who received a Tony nomination for his performance as radical teenager Melchior Gabor in Spring Awakening, was also seen on Broadway in In My Life. He most recently appeared on the New York stage in The Submission and plays the character of Jesse St. James on "Glee."

Learn more about Groff's theatrical history in the Playbill Vault.

*

At a Birdland concert featuring the music of composer-lyricist Scott Alan, Groff sang "Now," about dealing with a breakup.

Here, the Tony nominee enlisted dancers from Broadway's Tony Award-winning Anything Goes — and even learned Tony winner Kathleen Marshall's choreography — to re-create the eight-minute title tap number from the Cole Porter musical at MCC Theater's March 26 Miscast benefit. Obviously, he wowed the crowd!

Groff often reunites with Spring Awakening co-star — and best friend — Lea Michele. Here, in one of their many cabaret appearances, the duo sang "I'll Be Home for Christmas."

Here, Groff, Michele and the cast of Spring Awakening perform a medley of songs from the Duncan Sheik-Steven Sater musical including "Mama Who Bore Me," "The Bitch of Living" and "Totally F*cked."

Groff often performs "Larger Than Life" from My Favorite Year in his cabaret appearances. Here is his performance of that song by Lynn Ahrens and Stephen Flaherty.

Groff covered "A Case of You" by Joni Mitchell at a Joe's Pub performance.

On "Glee," Groff was introduced as Vocal Adrenaline bad boy Jesse St. James. Here, he drops by McKinley High and joins Rachel Berry (Michele) for a cover of Adele's hit song "Rolling in the Deep."

szólj hozzá: Rolling in the Deep

Before Groff rose to fame in the Tony-winning Spring Awakening, he made his Broadway debut in the short-lived In My Life. Here, in a sweet shout-out to his mother, he performed "I Am My Mother's Son" from that musical.

Groff was last seen on the New York stage in Jeff Talbott's award-winning play The Submission, where he played the role of eager playwright Danny Larsen. If you missed his edgy performance, check out highlights from the Off-Broadway run.

Before the Central Park production of Hair transferred to Broadway, Groff performed the lead role of Claude. Here are his performances of "Hair" and "I Got Life."

Since he didn't get to perform this song in Spring Awakening, we thought we'd include it here — Groff's performance of "Mama Who Bore Me."

Watch the previews for season two of "Boss," which begins Aug. 17 on Starz.