Rob Morrow and Kelli Williams to guest star on 'The Fosters'

LOS ANGELES, Oct. 4 (UPI) -- ABC Family says it has booked Kelli Williams and Rob Morrow as recurring guest stars on its drama The Fosters.

Williams is from The Practice and Army Wives, while Morrow is best known for his work on Numbers and Northern Exposure.

"Williams will play Justina, a well-connected foster-care specialist who proposes a significant investment in Callie's 'Fost and Found' website," the cable television network said in a news release. "Morrow is cast as Will, a liberal-minded free-spirit, who is introduced to the Adams Foster family through Stef's mom, Sharon, played by Annie Potts."

The one-hour drama -- about "a multi-ethnic family mix of foster and biological kids being raised by two moms" -- started production on the second half of its third season late last month in Los Angeles.

The show's ensemble includes Teri Polo, Sherri Saum, Hayden Byerly and Noah Centineo.