Dominick Birdsey
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Dominick Birdsey

Played by Mark Ruffalo

A former teacher-turned house painter, Dom is Thomas’ identical twin brother, and often placed in the role of “his brother’s keeper.”

I Know This Much Is True (HBO)
About the Series

I Know This Much Is True (HBO)

A family saga that follows the parallel lives of identical twin brothers in an epic story of betrayal, sacrifice and forgiveness.

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