Diane Lane will make her first public appearance after her split with husband Josh Brolin, to headline the Venetian Heritage benefit with Ed Norton on Monday. Richard Gere was to return as host this year to the Pershing Square Signature Center to read a tribute to Federico Fellini, but he had to back out due to movie commitments, we’re told. Among 250 dinner guests: Isabella Rossellini, Lee Radziwill, Alba Clemente, Princess Firyal of Jordan, Trudie Styler and Adrienne Vittadini.