Tom Hanks will give a special tribute to Nora Ephron during Tina Brown’s Women in the World Summit April 4-5. Hanks, who’s making his Broadway debut in Ephron’s “Lucky Guy,” will discuss the magic of Nora in front of power women including Oprah Winfrey, Meryl Streep and daughter Mamie Gummer, Eva Longoria, Diane von Furstenberg, Dr. Hawa Abdi, Tererai Trent and Lesley Stahl.