By James Hibberd
Updated January 17, 2013 at 12:00 PM EST
Getty Images

Rosemarie DeWitt is exiting HBO’s The Newsroom.

The United States of Tara and Mad Men actress is leaving the program after shooting only a couple episodes from the Aaron Sorkin cable news drama’s upcoming second season. She will be replaced by another actress and the production plans to re-shoot her character’s scenes. DeWitt was cast in the recurring role of Rebecca Halliday, a litigator who defends Atlantis Cable News in a wrongful termination suit. One source says storyline changes shifted the role’s production timeline and created a conflict for DeWitt (as a recurring character she wasn’t contracted to stay available throughout the whole season like a series regular).

Here’s a statement from HBO: “As the production schedule for season two of The Newsroom has shifted, Rosemarie DeWitt has encountered scheduling conflicts and will no longer be able to continue in her role.”