Naomie Harris found it ''intimidating'' when she discovered she was starring alongside the likes of Will Smith and Dame Helen Mirren in 'Collateral Beauty'.

Despite starring alongside Daniel Craig in 'Spectre' last year, the 40-year-old beauty felt under pressure to be her best working with some of Hollywood's finest actors.

However, the cast - which also includes Kate Winslet and Keira Knightley - were all really ''supportive'' and ''down to earth'' on set.

She told ''It was really intimidating I have to say. At the read through I was a bit like, 'Oh my gosh! I have to act with all of these incredible people.

''But they were so nice and so down to earth. Really, really lovely and so supportive.''

Harris recently admitted she would love to be her co-star Dame Helen.

Speaking about the 70-year-old legend, she said: ''I had one tiny scene with Helen but she is so amazing, she was incredible. It was just a scene where I had to just cry for basically four hours straight, but I wouldn't have wanted to do it with anyone better but her because she was so supportive, so encouraging, so warm and so down-to-earth, I just thought, 'I wanna be her.'''

Harris plays Madeleine in the emotional drama, and has admitted she hasn't suffered any losses in her life, but she has learned a lot about grief through making the film, which follows a grieving father Howard Inlet - played by Will Smith - who writes to Love, Time and Death after his six-year-old daughter passes away.

She said: ''I learned a lot, because I don't have children and I haven't lost a child before and I haven't really had any losses in my life and I had to explore all of that. And I found that to be a fascinating journey, so I grew as a result of it. I learnt a hell of a lot.''