The crossword solution for the term 'Unfaithful Actor' is GERE, which is a four-letter word. This refers to Richard Gere, an American actor who has starred in many films throughout his career. He is best known for his roles in films such as Pretty Woman, An Officer and a Gentleman, and Runaway Bride. Gere has also been involved in several controversies related to his personal life, including allegations of infidelity.