Reign Casts Amy Brenneman as Mary's Mother

Reign Season 1 Cast Amy BrennemanReign‘s Queen Catherine better watch out, because Mary’s mom is coming to court.

Private Practice alum Amy Brenneman will play Marie de Guise on an upcoming episode of the CW drama..

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The actress tweeted the news Monday, calling her maternal role “the badass.”

Brenneman also was recently cast opposite Justin Theroux (Six Feet Under) in Damon Lindelof (Lost) and author Tom Perrotta’s HBO pilot The Leftovers.