From WND: If you could pick a celebrity....

[ClearSights]

My obvious choice would be Eminem.

First off, he would be hell of an entertainment during the outbreak.
And second off, he is no dought a badass and knows how to use a gun.

[Fishie]

I think that Jet Li could be a pretty awesome comrade too. If only I could download martial arts in a few seconds, Matrix-style!

[ComradeNarf]

Tim Minchin would write amusing songs about the zombies, and keep people lighthearted so they don't succumb to despair at the hopelessness of the situation. I'm sure one of the apartments in the tower has a piano.

Incidentally, is your choice of Brendan Gleeson at all influenced by his presence in 28 Days Later?

I actually spaced that he was in that until immediately after I posted him as my suggestion. I was thinking more of his work in Lake Placid and The Guard when I posted it.