POWER COUPLES

and together they're a major item. When entertainment-industry headline makers hook up for love, professional benefits often follow, ranging from enhanced production clout and box office appeal to increased social or political prestige. Consider the following mergers and acquisitions: TINA BROWN AND HARRY EVANS He: President and publisher of Random House, 63. She: Editor in chief of Vanity Fair, 37. Status: Married Aug. 20, 1981. Two children-George Frederick and Isabel Harriet. Them: Authors and celebrities she woos for her glossy covers also pen best-selling books for his publishing list. JANE FONDA AND TED TURNER He: Cable magnate of CNN, TBS, and TNT, 52. She: Actress, political activist, exercise guru, 53. Status: Officially engaged. Them: He gets Hollywood respect. She gets a softer, more romantic image for the '90s that may ultimately allow her to exercise more clout. ARNOLD SCHWARZENEGGER AND MARIA SHRIVER He: Actor, 44. She: NBC journalist, 35. Status: Married April 26, 1986. Two children-Katherine Eunice and Christina Maria Aurelia. Them: He becomes politician material. She gets big- muscle entree into Hollywood and use of the Humvee. FRANK RICH AND ALEX WITCHEL He: Theater critic for The New York Times, 42. She: New York Times culture reporter and theater columnist, 33. Status: Married June 9, 1991. Them: They're a one-two punch in the theater arena. MIKE NICHOLS AND DIANE SAWYER He: Director (most recently of Postcards From the Edge and Regarding Henry), 59. She: Co-anchor of ABC's PrimeTime Live, 45. Status: Married April 29, 1988. Them: Love-and better TV lighting for Sawyer's well-tended face. BRUCE WILLIS AND DEMI MOORE He: Actor, 36. She: Actress, 28. Status: Married Nov. 21, 1987. Two children-Rumer and Scout. Them: Mucho marquee appeal regardless of who's up and who's down at the box office. MARIAH CAREY AND TOMMY MOTTOLA He: President of Sony Music, 42. She: Pop singer, 21. Status: An Item. Them: He discovered her. She brought him two Grammys.