DEF: Michael Mark “Entertainment Tonight Theme” by Ray Schuck · Published September 14, 2021 · Updated September 12, 2021 Exactly 40 years ago today, Entertainment Tonight debuted. Its theme music was written by Michael Mark. How do you rate this post? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this post.