- Daniel Day-Lewis as Daniel Plainview
- Paul Dano as Paul & Eli Sunday
- Kevin J. O'Connor as Henry
- Ciarán Hinds as Fletcher Hamilton
- Russell Harvard as H.W. Plainview
- Dillon Freasier as young H.W. Plainview
- Colleen Foy as Mary Sunday
- Sydney McCallister as young Mary Sunday
- David Willis as Abel Sunday
- Hans Howes as Bandy
- Paul F. Tompkins as Prescott
- Jim Downey as Al Rose
- David Warshofsky as H.M. Tilford
- Barry Del Sherman as H.B. Ailman
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