As previously reported, the six-episode drama, created by Greg Berlanti, Laurence Mark and Warner Horizon, is scheduled to premiere this summer.

Also in the cast are Tony nominee Sigourney Weaver (Hurlyburly), Tony Award winner Ellen Burstyn (Same Time, Next Year), Kristine Nielsen (Bloody Bloody Andrew Jackson), James Wolk, Sebastian Stan (Talk Radio), Brittany Ishibashi, Ciarán Hinds (The Seafarer) and Carla Gugino (The Road to Mecca).

The series "is a fictional look at a former first family that exposes a dynasty weakened by political ambition, lust and greed. It centers on Elaine Barrish (Weaver), the divorced former First Lady and newly appointed Secretary of State who throws herself into the job after recovering from the dissolution of her marriage and losing the presidential nomination. Barrish relies heavily on her son Doug (Wolk), an ambitious politico who serves as her chief of staff, but is tormented by his twin brother's struggles with addiction. With a philandering ex-husband (Hinds) who is still as much in love with her as the office he once held, she attempts to keep her family together, while simultaneously dealing with crises of the State Department and a hungry DC journalist (Gugino) bent on destroying her career."

Bart will play Barry Harris, who politely despises Elaine and loves cutting her out of policy decisions, and Futterman will play Alex Davies, a love interest for Gugino's character.

Burstyn, who also recently joined the cast, will play Elaine's mother, Margaret Barrish, a tough Chicago broad and one-time Vegas showgirl. Bart won the Tony Award in 1999 for his performance in You're a Good Man, Charlie Brown. He was nominated for The Producers and has also been seen on Broadway in Young Frankenstein, The Frogs, Triumph of Love, King David and Big River. For more on Bart's theatrical history, visit the Playbill Vault.