Lauren Graham has signed on to be Maura Tierney’s replacement on the new NBC Comedy Parenthood which premiers this March.

When Maura was diagnosed with breast cancer NBC tried to delay the show last fall but eventually Helen Hunt was looked at as her replacement but in the end the producer Ron Howard went with Lauren.

So, far four episodes have been shot with two last year and two in 2010.

Maura is said to be doing well with her treatment.