Neeson mistaken so often for Fiennes, he signs autographs as Ralph

Liam Neeson is often mistaken for Ralph Fiennes.

The 'Taken' actor has appeared in a number of films alongside Fiennes including 'Schindler's List', 'Clash of the Titans' and 'Wrath of the Titans' but admits their 'fans' often confuse them for one another.