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The actress and former beauty queen will join the cast of "Desperate Housewives" on Wisteria Lane this fall, ABC announced today. The series is entering its seventh season and could use an influx of new blood.

Williams will hit the show after appearing in the Broadway musical "Sondheim on Sondheim."

Ongoing stars of the show include Teri Hatcher, Felicity Huffman, Marcia Cross and Eva Longoria Parker.

The show is still getting decent numbers, sitting in the 11th spot in the latest Nielsen ratings, right behind "Survivor: Heroes- Villains' and "Dancing with the Stars."

For those who missed the season finale, here are the highlights:

Lynette realizes Eddie is the strangler and she gives birth to a baby girl. Gaby gets in to see Nick at the hospital by pretending to be Angie and brings him out of his coma. Susan has to leave her house. Bree informs Andrew and Orson that she has no choice but to sign over her company to Sam, since he knows about Andrew's hit-and-run of Mrs. Solis.

Watch it here.