Abigail Spencer joins NBC pilot

Drama 'Rex Is Not Your Lawyer' stars David Tennant

Abigail Spencer has been tapped to co-star in NBC's drama pilot "Rex Is Not Your Lawyer."

"Rex," from UMS and BermanBraun, centers on Rex Alexander (David Tennant), a top Chicago litigator who begins suffering panic attacks and takes up coaching clients to represent themselves in court.

Spencer will play Lindsey Steers, an ambitious lawyer at Rex's law firm who also is his fiancee.

Spencer, who is coming off a major arc on AMC's "Mad Men," is repped by ICM and attorney Harris Hartman.