Jackson Pollock
According To...

"He always slept very late. Drinking or not, he never got up in the morning . . . While he had his breakfast I had my lunch . . . He would sit over that damn cup of coffee for two hours. By that time it was afternoon. He'd get off and work until it was dark. There were no lights in his studio. When the days were short he could only work for a few hours, but what he managed to do in those few hours was incredible."

- Lee Krasner On Pollock's work habits