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- I Never Sang for My Father (1970) – Gene Hackman
- I Remember Mama (1948) – Oscar Homolka
- If I Were King (1938) – Basil Rathbone
- In America (2003) – Djimon Hounsou
- In the Line of Fire (1993) – John Malkovich
- In the Name of the Father (1993) – Pete Postlethwaite
- Into the Wild (2007) – Hal Holbrook
- Iris (2001) – Jim Broadbent
- Invictus (2009) – Matt Damon
Read more about this topic: List Of Nominees For The Academy Award For Best Supporting Actor (by Film Title)