Cara Delevingne was ''horrifically terrified'' before shooting her upcoming film.

The British model, who previously appeared alongside Keira Knightley in 'Anna Karenina' in 2012, admits she was very nervous before taking on a leading role in the upcoming drama, 'Playhouse Presents: Timeless,' and relied on her co-star Sylvia Syms for support.

Asked about working with the veteran actress, the 21-year-old star said: ''It gave me a lot of confidence to be honest because I was horrifically terrified. It kind of meant so much to me... I mean she's an incredible actress and to be able to watch her and even for a minute get her say to me she thought my performance was great, it's too much. I couldn't have asked for anything better.''

But Sylvia, 80, insists Cara had no reason to be afraid and she reminded her of the legendary actress Audrey Hepburn.

She told Vanity Fair magazine: ''The camera loves some people. A hundred years ago when the world was young, I worked with a lovely girl called Audrey Hepburn. The camera loved her, and she was natural in front of the camera. And this girl's got the same thing. I don't say that because I was paid to do the job, I say that because she has it. Some people have it.''

She added: ''We became just pals, it was just like we were two girls together and it was very natural.''

The made-for-TV film will air on the UK's Sky Arts network on June 19.