Kathy Hilton calls Lisa Rinna a 'bully' in Real Housewives Of Beverly Hills reunion trailer

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Kathy Hilton and Lisa Rinna were at each other's throats in Thursday's dramatic new trailer for the upcoming three-part Real Housewives Of Beverly Hills reunion special.The 63-year-old socialite got particularly personal when she accused the 59-year-old actress-turned-reality star of being the 'biggest bully in Hollywood' during a shocking exchange.The reunion, which airs its first episode on Bravo on October 12 at 8 p.m.

ET/PT, appeared to climax with Kathy's half-sister Kyle Richards, 53, being so overwhelmed with emotion that she asked host Andy Cohen through her sobs if she could leave early.

NBC Privacy Policy Going at it: Kathy Hilton and Lisa Rinna were at each other's throats in Thursday's dramatic new trailer for the Real Housewives Of Beverly Hills reunion special.

The 63-year-old socialite got particularly person when she accused the 59-year-old actress-turned-reality star of being the 'biggest bully in Hollywood' during a shocking exchange Can't handle it: The reunion, which airs its first episode on Bravo on October 12 at 8 p.m.