Fans of Sophie Ratner's jewelry include Selena Gomez, Elizabeth Banks and Octavia Spencer, butwhen the New York-based designer met The Flight Attendant’s Zosia Mamet, both women felt a kinship. “It’s kind of a funny story that I don’t think Sophie would mind me telling – her mom is my manager’s gynecologist, and I’ve heard all these hilarious stories about her,” Mamet says.