Cybil Shepard is an incredible acress, and a wonderful singer. She has pretty rotten luck with co stars- forst off, she was paired with Bruce Willis. The, she was paired with Christine Baranski. Neither of them tried to steal the spotlight (but they did).
I love now both Jack, and to a lesser extent, Tully in TGF both initially seem like better choices for Diane, than Kurt but in reality, its Kurt that is the perfect match.
Years later I'm still suffering about that horrible plot twist, thank you for the video though, I love Will and Alicia but Will and Diane friendship was just perfect.