Amanda Peet is experiencing some "Togetherness" with HBO and the Duplass brothers.

"Jack & Jill," "The Good Wife" actress Peet has signed on to star in the relationship comedy pilot "Togetherness," from sibling "Jeff Who Lives at Home" collaborators Mark and Jay Duplass.

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The half-hour pilot centers on a two couples living under the same roof who struggle to keep their relationships alive while pursuing their individual dreams.

Peet will play Tina Morris, an energetic and beautiful woman who is fun, outgoing, mischievous and smart in both dress and brain power.

The Duplass brothers will write, executive produce and direct the pilot.

Stephanie Langhoff of Duplass Brothers Productions will serve as co-executive producer.

Peet is currently in the new big-screen hit "Identity Thief." 

News of Peet's "Togetherness" casting was first reported by Deadline.