Max Irons has heaped praise on Saoirse Ronan saying he knew that she would be easy to work with from the moment that he met her.
The pair team up to bring Stephenie Meyer's The Host to the big screen and they are working for the first time.
And Irons admits that he thoroughly enjoyed working with Ronan on the movie.
Speaking to Flicks and Bits the actor said: "From the first moment I met her in London, I knew it was going to be easy.
"Some people are just easy to work with, and you watch her and you look at her face and think, 'What is she doing that's so special?'"
"You can't define [her charm], it's just there - it's all there, everything! She is always spot-on and perfectly informed.
"It still amazes me that she was 17 when we shot the film. I worked most closely with her and with William Hurt, two masters of their craft, and both were so humble, patient and generous.
"It was a joy. I listened and learned a lot from William Hurt, he is a master."
The Host is the latest Meyer novel to be adapted for the big screen and it sees Andrew Niccol back in the director's chair.
The Host kicks off a busy year for Irons as we are going to be seeing him in TV drama The White Queen.
He is also lined up to play Antonio Vivaldi in Vivaldi and has been linked to movie Posh.
The Host is released 29th March.