Mamie Gummer Joins List of Big C Season 3 Guest Stars

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Mamie Gummer, who was just cast as the lead on The CW's First Cut, is headed to Showtime this spring.

The actress will play one half of a couple - along with Hamish Linklater - who, according to the network's press release, "gives Cathy a shot at joy with an unexpected offer." Gummer will appear on several episodes and joins an impressive guest star list on season three that includes:

  • Brian D’Arcy James as Tim, someone who helps Sean move on from his past relationship.
  • Susan Sarandon as a motivational speaker named Joy.
  • Allison Janney as a Hollywood producer.
  • Victor Garber as Willy Wanker, someone who will butt heads with Sean over... ownership of an adult phone line.
  • Tammy Blanchard as Giselle, someone who plays a key role in Sean’s life.

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