Maura Tierney is exiting NBC’s new fall drama, “Parenthood,” as she continues to undergo treatment for breast cancer.

In July, news broke that production on the show was being postponed for eight weeks to allow the actress time to undergo a “medical evaluation,” NBC previously confirmed. Later, the actress confirmed she had a tumor in her breast, which required surgery.

Although the show’s start date was pushed back to mid-fall so that Tierney could undergo the treatment, it appears the show will now be moving forward without her and her part will be recast.

“While we are saddened that Maura Tierney won’t be able to continue in her current role in ‘Parenthood,’ our main concern is for her quick and full recovery,” an NBC spokesman said. “Our thoughts and best wishes are with her.”

A rep for the former “ER” star said the actress’ prognosis is good.

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