Glee star Darren Criss has become the first of the show's cast members to write original songs for the series.

Criss, who portrays Blaine Anderson on the show, has penned a track titled This Time, which will be performed by Lea Michele's character Rachel Berry during Glee's two-hour series finale on 20 March (15).

Another Criss tune, Rise, will also be featured on the show's 6 March (15) episode, according to The Hollywood Reporter.

Glee's sixth and final season wrapped filming in late February (15).