The lights will go dark for the last time in Pine Valley this week as fans bid a tearful farewell to veteran TV soap 'All My Children.'

However, preparations to relaunch 'AMC' as an online series are gathering steam, and it's been announced that some cast members have agreed to stay with the show when it moves to online production.

Prospect Park, the company that's taking over from ABC in producing 'All My Children' and 'One Life to Live' issued a statement Monday confirming that Cameron Mathison, who plays Ryan Lavery, and Lindsay Hartley, who plays Dr. Cara Castillo Martin, have agreed deals to join the company's new production of 'All My Children.'

Lois Lane, meet your mom, Teri Hatcher! That's right, Hatcher, the star of 'Desperate Housewives' and former Lois Lane on 'Lois & Clark: The New Adventures of Superman,' will appear on 'Smallville' as Ella, Lois' (Erica Durance) mother.

'Smallville' lore has established Lois' mom as dead, and that won't change. According to The Ausiello Files, Hatcher's Ella will appear in old videos Lois finds. Quite the casting coup for the final season of 'Smallville.'

In other casting news ...

• Jorge Garcia, Hurley on 'Lost,' has signed on to guest star in an episode of ABC's midseason comedy 'Mr. Sunshine.' Garcia will appear in the pilot episode as an employee of the San Diego arena Matthew Perry's character manages. [Ausiello Files]

• Oprah Winfrey will appear on the season premiere of 'Sesame Street' ... sort of. The daytime queen will lend her voice to an animated skit called 'The O Show.' The letter O will be the host of its own talk show. Guests include Otto the Orangutan and Ophelia the Octopus. [TV Guide]

• Emmanuelle Chriqui has joined the cast of Showtime's 'The Borgias.' Better known as Sloan on 'Entourage,' Chriqui will appear in three episodes of the period drama as Sancia, a Neapolitan princess who marries the Pope's youngest son. [TV Guide]