United Kingdom, Nov. 28 -- Sydney Sweeney is "handling" fame "incredibly well", according to her Christy co-star Ben Foster.

The 28-year-old actress plays real life boxer Christy Martin in the new sports drama opposite Ben as James V. Martin, Christy's coach-turned-husband, and the actor, 45, is full of praise for his co-star and is convinced she's coping well since being thrust into the spotlight - calling her "incredibly impressive".

Foster told The Independent newspaper: "Sydney is her own force. She came in extremely prepared, knew the crew's names, was always ready to work.

"I'd be knackered at the end of the day, and she'd go train for another three hours to fight the next morning ...

"[She] is in a zeitgeist worldview that is ....