Davis, a Tony winner for August Wilson's King Hedley II and an Academy Award nominee for her performance in the film of John Patrick Shanley's "Doubt," will debut in the second episode of the upcoming season. The actress will appear in seven episodes in total, portraying artist Lynda B. Dozier, who takes on a major role in the lives of Tara and her daughter Kate.

In "Tara," Collette stars as a suburban housewife coping with disassociate identity disorder, formerly known as multiple personality disorder. The cast of the series will begin filming the twelve-episode second season in August, aiming for a 2010 launch.

Academy Award-winning "Juno" screenwriter Diablo Cody pens the series that premiered on the cable network Jan. 18. John Corbett ("Sex and the City") appears as Collette's husband with Keir Gilchrist and Brie Larson, who portray the children in the family. Rosemarie DeWitt plays Collette's sister.

Collette inhabits an array of personalities in the series, including "'T,' a provocative teenager who flits around in midriffs and Daisy Dukes; to 'Buck,' a beer-swilling, trucker-hat wearing Vietnam vet who is prone to violence when (easily) provoked; to 'Alice,' a 1950s Betty Crocker housewife who bakes pies in pumps with nary a meticulously hair-sprayed curl out of place."

For further information visit www.sho.com.