Angelina Jolie made a rare trip out with the twins, Vivienne and Knox, to the Malibu Country Mart, on Saturday. After having kept her kids under wraps for months, during a bitter divorce and custody battle with estranged hubby Brad Pitt, the mother of six, finally stepped out with her two youngest, knowing photographers would snap some pix in the celebrity hotspot near the beach. Jolie was dressed for the occasion -- stepping up her fashion game with black boots over sexy black leather pants and a silk camisole top. The look was a departure from her sometimes dowdy slacks and flats.

Vivienne kept close to her mom, sucking her thumb, while a clean-shaven Knox looked more independent. The eight-year-olds have seen their dad only a handful of times since the couple's split in September. With Angelina filing for an investigation by Child Protective Services and a subsequent sealing of documents related to their divorce and custody case, it's not clear exactly what the actress accuses Brad of doing, in addition to the event that sparked her divorce filing -- an alleged physical altercation between Brad and her oldest son Maddox in a private jet last fall.

But we may learn the back story if celebrity biographer Ian Halperin has his way ... the investigative journalist is playing a tell-all documentary about the couple and their problems. They were together for 12 years and married for two -- the relationship had a rocky start when the two met on the set of Mr. And Mrs. Smith and Brad ended up leaving then-wife Jennifer Aniston for the humanitarian-actress. Now, fans wait and watch, curious to see who each will hook up with next. Brad's rumored to be dating Kate Hudson while no news has come out about Angelina. We suspect she'll choose someone like a human rights attorney -- the male version of Amal Clooney ...