Ewan McGregor has praised Naomi Watts for the variety that she brought to her role in The Impossible
The pair play husband and wife who are separated after being caught up in the 2004 Tsunami.
And McGregor went on to call the performance that Watts delivers in the film as an 'extraordinary achievement'.
Speaking to The Press Association the actor said: "For 85 percent of the movie, she's really badly injured, fearful for her life and the safety of her husband and her other two sons, anticipating the fact that she might be dying," he said.
"There's never a sense of that being on one note. I've talked to her about it.
"I said, it's an extraordinary achievement that you managed to weave such variety into it and take us on this huge journey."
The Impossible kicks off what will be a busy year for McGregor as he is also set to star in Jack the Giant Killer and August: Osage County.
Son of a Gun and Born to be King are also in the pipeline.
The Impossible is released 1st January.