Meet Vivienne & Knox Jolie-Pitt  —  They are just 3 weeks old, but twins Knox Léon and Vivienne Marcheline are about to take the world by storm.  —  In an exclusive interview and photos, Brad Pitt and Angelina Jolie offer PEOPLE an intimate look at their growing family.

OLSEN TO HEATH FEDS: LET'S DEAL  —  DEMANDS IMMUNITY FROM PROBERS  —  Pint-size actress Mary-Kate Olsen has refused to be interviewed by federal investigators probing the accidental drug death of her close friend Heath Ledger unless she receives immunity from prosecution, The Post has learned.

Jennifer Garner Gives Speech For Obama  —  A pregnant Jennifer Garner gave a “witty, clever” speech supporting presumptive Democratic presidential candidate Barack Obama at a fundraiser on Saturday night, People reported.  —  Joined by husband Ben Affleck, as well as friends Matt Damon and wife Luciana …

TYRA'S DRESS-UP  —  TYRA Banks - the mastermind of gimmicks - is at it again.  Banks - who once had her breasts examined on TV to show everybody they were “real” - is now dressing up as Michelle Obama for the September cover of Harper's Bazaar.  “It's a full makeover,” said one spy.

New gang lined up for “Scooby-Doo” TV movie  —  LOS ANGELES (Hollywood Reporter) - A third “Scooby-Doo” movie will begin production Monday in Vancouver, but will bypass theaters and feature a cast of unknown actors.  —  “Scooby-Doo: In the Beginning,” a live-action/computer-animated film …

Sunburned Sly Stallone, 62, shows of his buff body... and his wife's not bad either  —  Hollywood hardman Sylvester Stallone appeared to be a touch overcooked as he sported his two giant shoulder tattoos on board retail entrepreneur Philip Green's luxury yacht.

Reese and Jake: We Are Not Engaged  —  Reps for Reese Witherspoon and Jake Gyllenhaal are denying tabloid reports that the couple are engaged.  —  “They are not engaged, getting married or any of the reports,” the reps tell PEOPLE exclusively, calling the reports “lies.”

McCain's Celebrity Ad: Frivolous, A Waste Of Money, A Waste Of Time  —  I've been asked again and again for my response to the now infamous McCain celebrity ad.  I actually have three responses.  It is a complete waste of the money John McCain's contributors have donated to his campaign.

Happy Homecoming, Madonna  —  Getting back to her roots!  —  On Saturday, Madonna attended the Traverse City Film Festival, a Michigan film festival founded by fellow native Michael Moore.  —  She's looking better but still.....tired.  —  Madonna was there to introduce her Malawi orphan documentary …

Teens Give It Up for Gossip Girl, Jonas Boys  —  The question now is, can Justin keep up with the Jonases?  —  Hot on the trail of a certain hunky pop star, the Jonas Brothers took home six ceremonial surfboards Sunday at the 10th Annual Teen Choice Awards, aka TC08, giving the fraternal rockers …

Christina Applegate Diagnosed With Breast Cancer  —  Christina Applegate has been diagnosed with breast cancer, a rep for the 36-year-old Samantha Who?  Emmy nominee announced late Saturday.  —  In full, the spokesperson's statement said:  —  “Christina Applegate was diagnosed with an early form of breast cancer.