CELEBRITY EXTRA - By Cindy Elavsky

A: Production has begun on "The Social Network," which stars Rashida Jones, Justin Timberlake and Jesse Eisenberg, and is directed by David Fincher ("Fight Club," "Se7en," "Panic Room" and "The Curious Case of Benjamin Button"). Shelby Young ("Days of Our Lives" and "Wild Child") recently finished shooting her supporting role in the film. While she couldn't tell me much about the movie or her role in it (they have all signed confidentiality agreements so the story doesn't leak out), what she could tell me is that the movie is about the founders of the social-networking site Facebook. Like many of the film's stars, Shelby admits, "I am such a huge fan of 'Fight Club,' so the chance to work with David Fincher, I just couldn't pass that up." Look for "The Social Network" in theaters come October.
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Q: At the end of last season it was stated that "Friday Night Lights" was coming back this year. Has that changed? I haven't been able to find anything about it. -- Phillis M., via e-mail

A: Season Four of "FNL" is slated to premiere Friday, April 30, on NBC. Per an agreement with DirecTV, the fourth season already aired on The 101 Network from October 2009 through this past February, with NBC re-airing the season coming next month. If you want to be surprised by what happens this season, beware of online spoilers from those who already saw the episodes on The 101!
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Q: For this final season of "Lost," I am as confused as ever -- and LOVING it! I also love one of the newer characters, Jacob. What can you tell me about the actor who plays him? I know I've seen him in other things. -- Melanie C., Dayton, Ohio

A: Mark Pellegrino, 44, who has played Jacob on "Lost" since the end of the previous season, has been in a ton of movies, such as "The Big Lebowski," "Mulholland Drive," "Capote" and "National Treasure." On the small screen, he is most known for playing the Devil on "Supernatural" and Paul Bennett on "Dexter." I asked Mark when we chatted recently if it was intimidating for him to join such an established, phenomenon of a show so late in the series.
"Luckily I didn't know it was such a huge phenomenon until I landed on the island and was told," Pellegrino said. "When you audition, the character sides are not the character you are auditioning for, and the scenes are just made-up stuff to throw off all the people on the Internet who are so anxious to get the material. I had no idea what it meant until I got there and they told me I'm Jacob. And then it dawned on me what a big deal it was."

Write to Cindy at King Features Weekly Service, P.O. Box 536475, Orlando, FL 32853-6475; or e-mail her at letters@cindyelavsky.com. For more news and extended interviews, visit www.celebrityextraonline.com and twitter.com/Celebrity_Extra.