Ana Gasteyer is extending her stay on 'Suburgatory.'

According to EW, the 'Saturday Night Live' veteran has been upped from a recurring guest star to series regular for the rest of the season.

Gasteyer plays Sheila Shay, George and Tessa's neighbor, on the new hit ABC comedy. The actress described her character as a "well-intended nightmare."

Look for more of Sheila's good intentions to backfire in upcoming episodes.

In other TV news ...

Taraji P. Henson is a 'Person of Interest.' The Oscar-nominated actress will star opposite Michael Emerson on the CBS pilot.

According to Vulture, Henson will play Carter, a detective. The J.J. Abrams-produced pilot follows an ex-CIA agent who is hired by a billionaire to help fight crime in New York City. Emerson will play the eccentric billionaire.

Henson previously appeared on 'Eli Stone' and 'Boston Legal.'

In other casting news ...

• Gabrielle Union has joined the cast of 'Little in Common.' The Rob Thomas comedy follows three couples who are connected via Little League sports. Union will play a very competitive lobbyist. [Deadline]

• Jean Smart will star in NBC's untitled comedy about a family of doctors. Smart will play Dr. Barbara Foote, a meddlesome mom. [Deadline]

• Aidan Quinn will star in 'Prime Suspect.' Quinn will play Lt. Kenny Rowe. Maria Bello stars as Det. Jane Tennison. [TVLine]