Loose Lips

Robin Williams is divorcing his wife of almost 20 years, Marsha Garces. The pair is citing irreconcilable differences. • Richie Sambora's 10-year-old daughter by Heather Locklear, Ava, was allegedly in the car last night when he was arrested for a DUI. For shame, dude, for shame. • Jamie Lynn Spears: def engaged. Baby daddy Casey Aldridge's cousin, Tina Robinson, told Us, "He proposed a few days ago, and she accepted." Also, Casey's great uncle is named Odus. That is all. [Entertainment Tonight, Us, Us]