After more than a year in production, we finally have our first look at Ron Howard's "In the Heart of the Sea," a survival drama based on the true story of the whaling ship Essex. Attacked and sunk by a massive albino sperm whale in 1820, the 21 sailors dumped into the sea were forced to survive for more than 90 days with little food and water. Only eight survived the ordeal.

“We were headed for the edge of sanity, like we were apparitions, phantoms," actor Brendan Gleeson narrates in the first trailer for the film. "Trust gave way to doubt. Hope to superstition."

In addition to Gleeson, "Heart" includes Chris Hemsworth, Cillian Murphy, Ben Whishaw, Benjamin Walker and Tom Holland. In an interview last year, Hemsworth described the crash diet he went on to lose his "Thor" physique to play a famished sailor. 

"It ends up being a couple small salads, a couple pieces of protein, and that's about it," he told Jimmy Kimmel. "You go to bed hungry and then you have a fasting period of about 15 hours — and then you (once again) have little meals throughout the day." 

"In the Heart of the Sea" hits theaters on March 13.

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