People a starting to think that the Character is based on the Russian actor, Vladimir Mashkov.
------------------------
From kotaku.com
In case you missed it, the GTA IV trailer broke the internet earlier today. While we don't know the background of the protagonist, game site PSX Extreme guesstimates that the character is based on famed Russian actor Vladimir Mashkov, who appeared in the Owen Wilson movie Behind Enemy Lines. The actor has won something like nine Best Actor awards in his home country. PSX Extreme writes:
Yes, just look at those HUGE ears! The IMDB page for the game does not have a full cast listing yet. As soon as we hear something, we'll definitely pass it along.
------------------------
It does look a lot like him.