In 2006, I did a post excited about Steven Spielberg's film Lincoln, with a note of interest over the fact that Liam Neeson would be playing Lincoln, and in fact, I found it surprising the similarities in their looks, height, and even age.
5 years later, the film did not come out in 2007 as expected, Liam is out, and Daniel Day-Lewis is the star.
Like the casting of Liam Neeson, Daniel Day-Lewis is not an American actor, rather he's English with British and Irish citizenship.
Daniel Day-Lewis is current 54 (like Liam in 2006). Lincoln died at the age of 56.
But Day-Lewis' height doesn't stack up, he's guessed to be 6'1", compared to Lincoln's 6'4" (pre-top hat).
Daniel Day-Lewis is the star amongst a great cast (Joseph Gordon-Levitt, John Hawkes, Tommy Lee Jones, Sally Fields, Hal Holbrook).
Liam's performance vs. Day-Lewis performance are certainly different prospects, but as long as Daniel Day-Lewis isn't over the top it could be a fantastic performance.