Groff starred in the show's first season as Jesse St James, a love interest for Rachel (Lea Michele).
Last month, it emerged that he has signed up to star in the final three episodes of the current run.
Zap2It reports that the tracklisting for Glee: The Music, Vol. 6 has now been released.
The listing suggests that Groff will collaborate with the Glee cast on a cover of Adele's track 'Rolling In The Deep'. Rumours have suggested that the song could be a duet with Michele.
The news comes shortly after Gwyneth Paltrow sang Adele's 'Turning Tables' on the show.
Glee airs on Tuesdays at 8/7c on Fox in the US and on Mondays at 9pm on E4 in the UK.
> Jonathan Groff unsure about 'Glee' plot