Imogen Poots has hailed Kristen Stewart as "one of the greatest directors" she's ever worked with.The 34-year-old actress is making her directorial debut with 'The Chronology of Water' - which is an adaptation of Lidia Yuknavitch's memoir of the same name - and Imogen has revealed that she's relished the experience of working with the Hollywood star.The 35-year-old actress - who stars in the new movie - told Collider: "She's really something. She was born to do it. I'm so proud of her."Imogen and Kristen are both "incredibly passionate about the project".The actress actually likened them both to "sports coaches" when they're on set.Imogen explained: "We'd like shout at each other on set like sports coaches. We were both incredibly passionate about the project and had the same energy around it and the stakes were very high for both of us all the time.