Robin Wright Penn Files for Divorce  —  Sean Penn and Robin Wright Penn  —  Robin Wright Penn has filed for divorce from her husband Sean Penn, PEOPLE has learned.  —  The papers, filed in Marin County, Calif., on Aug. 12, state that “both parties have already agreed to [shared] custody” …

Reality Star on the Run in Model Murder  —  Law enforcement tells us they now have a person of interest in the murder of a Playboy model who was found dead and stuffed in a suitcase in Orange County.  The man is Ryan Alexander Jenkins, who was a contestant on VH1 reality show.

Kim Kardashian and Reggie Bush Spotted Together  —  Are Kim Kardashian and Reggie Bush keeping up with each other?  —  Just three weeks after they amicably split, the pair were “all smiles” as they walked together Monday into a Ruth Chris Steak House in New Orleans, an observer tells PEOPLE.

Jon & Kate Plus Aggravation  —  We're told TLC is not happy with Jon Gosselin, but Jonnie boy may not care, because he has his sights set on a new show.  —  We're told Jon is in talks with a major production company — Endomol — to appear in a show called “Divorced Dad's Club.”

Britney Spears Does Top 10 List on Letterman  —  And the No. 1 reason to read this story ... Britney Spears in a bikini!  —  The pop star stripped down to a little black bathing suit and tucked a red hibiscus in her hair to deliver the Top 10 list Tuesday night in her return to The Late Show with David Letterman.

Johnny Knoxville to Have Another Baby  —  Jackass star Johnny Knoxville is going to be a dad for the second time, his rep confirms to Usmagazine.com.  —  His girlfriend of nearly a year, Naomi Nelson, is three months pregnant.  —  “Yes, they are expecting and very excited,” his rep tells Us.

Kourtney Kardashian Agonized Over Whether to Keep Her Baby  —  Kourtney Kardashian's unplanned pregnancy forced the shocked reality TV star to make one of the most difficult decisions in her life: Would she have the baby or terminate the pregnancy?  —  “I definitely thought about it long and hard …

Joe Jonas and Kelly Clarkson to guest judge ‘American Idol’  —  Next to fill Paula Abdul's seat?  Joe Jonas and “American Idol” Season 1 winner Kelly Clarkson.  —  Sources tell Showtracker that the pair are nearing a deal to guest judge an audition round of the competition.

‘So You Think...’ Star Charged with Rape  —  A former choreographer for “So You Think You Can Dance” was arrested again for allegedly sexually assaulting four women — but this time he's actually being charged with a crime ... or eight, to be exact.  —  Cops say Alex Da Silva was arrested …

Paris Hilton cleared in film publicity trial  —  A US District Court judge has ruled that Paris Hilton will not be made liable for the costs of her flop movie Pledge This!, reports BBC News.  —  The star had been sued for $8.3 million (£5 million) by the producers of the sorority comedy …

Who the Heck Is Kari Ann Peniche and How Did She Wind Up Naked With McSteamy?  —  Kari Ann Peniche is not just the hot mess with a troubled past who made the (temporary) jump from obscurity to infamy faster than you can say “Rick Salomon.”  —  Oh, no. The “quality hang” of Eric Dane and Rebecca Gayheart is so much more than that.

Twighlight exclusive - Robert Pattinson: I haven't got a girlfriend  —  If you're over 18, then the name Robert Pattinson may not mean much to you.  But mention it to your teenage daughter and you'll be deafened by her squeals of excitement.  —  British hunk Robert, 23 …

Jon Hamm gets ‘Sucker’ punched  —  Joins Emily Browning, Jena Malone in action fantasy  —  “Mad Men” star Jon Hamm has joined the cast of “Sucker Punch,” an action fantasy Zack Snyder is directing for Warner Bros. and Legendary Pictures.  —  Hamm joins Emily Browning, Vanessa Hudgens …

Brad Pitt: I Don't Have to Be a Nazi to Beat Ass  —  Brad Pitt may have turned into a humanitarian hottie since hooking up with Angelina Jolie, however the star of Quentin Tarantino's WWII flick “Inglourious Basterds” still gets a kick of it kicking others.  Literally.  —  “I just like kicking ass period.

Celine Dion Is Pregnant with Second Child  —  Making good on her expressed desire to have more children, Céline Dion is pregnant.  —  A family member tells PEOPLE, “We learned this morning.”  While a rep for the 41-year-old singer confirmed the news to various outlets saying …

Exclusive: ‘Caprica’ snags James Marsters!  —  Caprica exec producer Jane Espenson is using her powers as a charter member of the Whedonverse for good.  Sources confirm to me exclusively that Buffy all-star James Marsters is joining the Battlestar Galactica prequel for a sizeable arc.

Exclusive: Gina Torres Joins Gossip Girl  —  Gina Torres will appear on Gossip Girl this fall as Vanessa's mom, TVGuide.com has learned exclusively.  —  Gabriela Abrams, mother to home-schooled vid-kid Vanessa, is described as being warm and outgoing, which will certainly be a change of pace for this show …