In a new film still, the 23-year-old sits by the river bank in a look which is worlds apart from anything she has been seen in before.
Her hair is messy and there's not a shred of haute couture in sight. Instead, the grubby-looking character wears a frayed brown skirt and a green holey top.
But the biblical adaptation - which is reportedly exceeding its $125million budget - may be headed down its own road to doom as it has been testing poorly with religious audiences, possibly the film's largest market.
Hollywood legend, Russell Crowe stars as the biblical ark builder in the film based on the Old Testament tale, which sees him sport a full bushy beard.
Handsome actor, Douglas Booth plays Noah's son, Shem and he has a relationship with Ila.
The story focuses on Noah's mission to save his family after seeing visions of an inevitable apocalypse.
I went through a time of being quite insecure,' Ellie told Cosmopolitan. I’d convinced myself I was fat; I didn’t like my figure and I had a big nose.
Now I’ve finally got to a place where I don’t focus on those things,' Ellie admits. 'I feel like I’m not changing for anyone; I’m doing it all for myself. Because there’s no one else to do it for.
Ellie also opened up about her anxiety issues, which she said without getting to the bottom of them she was convinced she was going to die.
One day after a shoot I was on a train going to a funeral and my heart was pounding; I thought I was having a heart attack,' she told the magazine.
'When I got to Cardiff, the next train was cancelled, so I had to get in a cab with strangers to Hereford. I was so scared I reached over to this woman and said, "I think I’m dying.