Liam Neeson may be the world's most improbable action star.
The towering 59-year-old star of "The Grey," known earlier in his career for roles in critically-lauded films such as "Schindler's List" and "Kinsey," has turned into one of the most reliable action stars. And he did it at an age when contemporaries such as Denzel Washington and Bruce Willis have become less than a sure thing in action movies.
The former forklift operator from Northern Ireland also delivers at least as well -- or better -- than younger stars such as Matt Damon, Vin Diesel and Nicolas Cage in those movies. His mid-life transformation, which began with 2008's "Taken," has continued after the 2009 death of his wife Natasha Richardson in a skiing accident.
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In "The Grey," Neeson plays a man working on an oil field in Alaskan who must survive the elements and a pack of wolves after a plane crash. The movie opened last weekend to $20 million at the domestic box office, exceeding expectations.
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Last year, "Unknown" grossed $61.1 million domestically on a budget of $30 million.
"Taken" -- the movie that turned the Academy Award-nominated actor into an action star -- grossed $145 million domestically on a $25 million budget in 2008.

Of his recent action movies, "The A-Team" was a disappointment, grossing $77.2 million domestically on a $110 million budget in 2010. But it was an ensemble adaptation of a TV show that did not rest on Neeson's shoulders or play to his strength as middle-aged man with something to prove.
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Now look at action films starring Washington, a close contemporary to Neeson at 57, and once a go-to action star. Universal is opening his next movie, "Safe House," on Feb. 10.
His 2010 "Unstoppable" grossed $81.6 million domestically on a budget of $100 million. "The Book of Eli," in 2010, took $94.8 million on an $80 million budget. "The Taking of Pelham 1 2 3" in 2009, grossed only $65.5 million domestically on a $100 million budget.
Willis has seen his star power diminish from his heady days heading the "Die Hard" franchise. Now 56, a few years younger than Neeson, he has an uneven record at the box office, with "Red" and "Cop Out" among his recent offerings.

Damon is a generation younger at 41.
