Ariana Grande is set to perform alongside Cynthia Erivo at the Oscars

In a post on Instagram, the Academy Awards said: "A spellbinding moment awaits. Cynthia Erivo and Ariana Grande take the #Oscars stage for a performance you won't forget.

"Watch the Oscars LIVE Sunday, March 2, at 7e/4p on ABC and Hulu, with Conan O'Brien hosting. Expect the unexpected-only at the Oscars. (sic)"

Ariana played Glinda in 'Wicked', and she earned a nomination for the Best Supporting Actress Oscar.

Cynthia, on the other hand, played Elphaba in the musical fantasy film, earning a Best Actress nomination for her performance.

Meanwhile, Cynthia previously revealed that she developed an immediate "connection" with her 'Wicked' co-star.

The actress told 'Extra': "When we found out we were doing this, I asked her to come around and just chill. We organised it together and she came to my house. We sat on my floor and chatted for hours and hours and hours.

"I think in that moment, we both realised that we had something, like an immediate sort of connection."

Ariana also relished the experience of working with Cynthia on the movie.

She said: "I think the thing that's been most special about it is that, from the moment we met, our first talk, we had a really honest agreement and commitment to take care of each other and to always be honest with each other and make space for the feelings that come up along the way and just take care of each other as friends.

"That just grew and grew and grew deeper and deeper as the process went on and still is. It's just like really, really beautiful and legit. I'm so grateful."