Lady Gaga is slated to perform her Oscar-nominated song (co-written with Grammy winner Diane Warren) "Til It Happens to You" on the forthcoming Academy Awards telecast. Released last September, the song is from the documentary film "The Hunting Ground," which exposes the issues of campus rape at colleges across the U.S.

Oremus, the Tony and Grammy-winning Broadway music director and orchestrator of Book of Mormon, Kinky Boots and the upcoming Frozen, wrote the orchestral arrangement for the pop song that Gaga will perform during the Feb. 28 awards broadcast.

Reunited and it feels so good! Rehearsing "TIll It Happens To You" written by these extraordinary women. I will be conducting my arrangement of the song for Lady Gaga's epic performance on the Oscars on Sunday. Check it out. ❤️❤️❤️

A photo posted by steoremus (@steoremus) on Feb 22, 2016 at 11:16pm PST

Earlier this year I had the honor of arranging a song for these genius women- Lady Gaga & Diane Warren- for a very powerful film called The Hunting Ground. This was from our joyous session. It's finally been released! Check it out on iTunes! #tilithappenstoyou https://itun.es/us/0Hsd-

A photo posted by steoremus (@steoremus) on Sep 20, 2015 at 5:55pm PDT

Oremus, who was the music director for last year's Academy Awards, worked with Lady Gaga to conceive the buzzed-about Sound of Music medley that even impressed the film's star, Julie Andrews.

Inside Lady Gaga's Sound of Music Performance! Musical Director Stephen Oremus Shares Exclusive Details