Washington DC, Sept. 11 -- The makers have unveiled the trailer for 'Christy', a sports biopic starring Sydney Sweeney as legendary boxer Christy Martin, the first female fighter inducted into the International Boxing Hall of Fame, reported by Variety.

The film, directed by David Michod and co-written with Mirrah Foulkes from a story by Katherine Fugate, also features Katy O'Brian, Merritt Wever, Ben Foster, Ethan Embry, Chad L. Coleman, Valyn Hall and Tony Cavalero.

Premiering at the Toronto International Film Festival, the film drew attention not only for its subject but also for Sweeney's physical transformation for the role.

The actor revealed to Variety that she gained 30 pounds through a rigorous regimen designed by a nutritionis...