On 21st of February 1954, Leonard got married to Sandra Zober. Sandra Zober was also an actress. As his loving wife, she gave birth to two children. Though they were married for about three decades, they got divorced in 1987.
Leonard remained singe for few months and began his romantic love affairs with Susan Bay. Susan Bay is an actress from United States. After being in love for several months, they got married on 1st of January 1989.
Leonard began his acting career since he was 8. At a young age, he began performing in children’s and Neighborhood Theater. Though both of his parents wanted him to study hard in the college, he began pursuing his acting career and he finally made his professional acting debut in 1948 by starring the role of Ralphie in the drama series, Awake and Sing!. He also joined Boston College to study acting. He also worked at an ice cream parlor. In 1953, he joined United States Army Reserve and served them till 1955. During his departure from United States Army Reserve, he was ranked a sergeant. In 1951, he appeared in the movie Queen for a Day where he played the role of Queen for a Day. During the mid 1950s, he also starred in the TV series like Dragnet, The West Point Story, Highway Patrol and many more. His breakthrough role came in 1979 after he portrayed the role of Spock in the science fiction film Star Trek: The Motion Picture. For his role in the TV series Star Trek, he earned the salary of $1,250 /episode. His net worth was said to be around $45 million at the time of his death.