'Glee' alum Harry Shum Jr. to join 'Grey's Anatomy' for season 19

Shum is trading show tunes for surgery.

"Glee" and "Crazy Rich Asians" alum Harry Shum Jr. is joining "Grey's Anatomy" this fall for the upcoming season 19.

Shum will play a character named Daniel "Blue" Kwan on the long-running ABC medical primetime drama, the network announced Wednesday.

Blue is described as "a sharp-witted, impatient, and brilliant first-year surgical resident" who "is generous by nature but competitive to a fault, naturally gifted, and used to winning at everything."

The casting comes on the heels of "Grey's Anatomy" adding a slew of other newcomers, including "Inventing Anna" alum Alexis Floyd, "The Thing About Harry" star Niko Terho, "The Sex Lives of College Girls" star Midori Francis and "Reign" alum Adelaide Kane.

Shum played Mike Chang on "Glee" for its six-season run and popped up as Charlie Wu in a mid-credits scene during 2018's "Crazy Rich Asians," based on the Kevin Kwan novel of the same name. He's set to reprise that role in the sequel film, an unnamed project based on Kwan's follow-up novel, "China Rich Girlfriend."

"Grey's Anatomy" season 19 premieres Oct. 6 on ABC.