By peoplestaff225
Updated April 01, 2007 03:37 PM

Actor Cillian Murphy says the best part of fatherhood, to son Malachy, nearly 16 months, is that it has made him a better human being.

The worst part, though, he says is the "lack of sleep."

Malachy’s mom is Cillian’s wife, artist Yvonne McGuinness.

Source: Newsday