《人鬼情未了》的主題曲是《Through the Years》，以下是歌曲的歌詞：
"Through the years, though it seemed
My life was all confusion
You were there, and your love gave me meaning
Life's journey has many turns
But you've been my guiding light
Though the winds of change may blow
Darling, I'll be here along
Through the years"
這首歌的歌詞表達了對愛人的深深思念和承諾，無論歲月如何流逝，對你的愛永不改變。