It isn't the first time the comedian has showed off his vocal skills on the big screen. He also sang in movie musicals "Sweeney Todd: The Demon Barber of Fleet Street" and "Les Miserables."
Filming on the untitled biopic is expected to begin this spring, and Cohen is reportedly training with a vocal coach to make sure he can hit the high notes just like the late superstar.
A source told British newspaper The Sun, "Sacha is a huge Queen fan and is focused on getting Freddie's mannerisms, style and speech perfect. He is working on building his vocals. It is a uphill task, because Freddie has such a unique power and tone."
The Freddie Mercury biopic is scheduled to be released in 2014.