Emily Mortimer is in talks to portray the female lead of the new HBO pilot More as the Story Develops for creator Aaron Sorkin.

The actress will play MacKenzie, the executive producer of a cable news show which features anchor Will McAllister (Jeff Daniels). It is said that MacKenzie lives for her job, with all other aspects of her life taking a back seat to her work.

We reported last week that Marisa Tomei was close to signing on for the MacKenzie role, although she ultimately passed on the project, deciding not to get locked into a TV series at this time.

Shortly after Marisa Tomei passed, HBO entered into talks with Emily Mortimer. The story from last week also indicated actresses Olivia Munn and Alison Pill are in talks to play a financial analyst on the network and an associate producer, respectively. Both actresses are locking up their deals.

Greg Mottola will direct the pilot from a script by creator/executive producer Aaron Sorkin. It still isn't known when production will begin on the pilot.