Character

Tess Mercer

Tess Mercer in Smallville (2001), played by Cassidy Freeman.

Tess Mercer (born Lutessa Lena Luthor) is Lex Luthor's former protégée and younger half-sister, and Lionel Luthor's illegitimate daughter with Pamela Jenkins.
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Played by

Cassidy Freeman

Appears in

Smallville2001