Chelsea Clinton‘s diamond engagement ring drew a crowd backstage at this weekend’s Women in the World: Stories & Solutions conference. Clinton was surrounded in the green room at the Hudson Theater Friday night by host Tina Brown, Diane von Furstenberg and Barry Diller, who all admired her bauble from fiancé Marc Mezvinsky. Chelsea’s future mother-in-law, Marjorie Margolies-Mezvinsky, was repeatedly asked, “Where are they getting married?” But she politely replied, “I can’t say.” We’re guessing Martha’s Vineyard. Chelsea avoided journalists on the red carpet while mom Hillary posed for pictures. Diane Sawyer and Katie Couric had little to say to each other on Saturday. “Pleasantries were kept to a minimum,” said a spy. Security for Jordan’s Queen Rania al Abdullah at first denied green room entry to Cherie Blair, wife of former UK Prime Minister Tony Blair, until they learned who she was.