COLIN FARRELL - FARRELL PARTIES HARD TO SLEEP

Hollywood wildman COLIN FARRELL insists their is a serious reason behind his constant partying - it helps him sleep.

The PHONE BOOTH star insists it in his Irish blood to party hard, and he finds it difficult to sleep without it.

He says, "After a long day's work I can't go home and get into bed and flip on FRIENDS and order a pizza and get a good night's sleep.

"That doesn't work for me. I don't sleep much. I operate on very little sleep. It's just the way I've always been."