We know Montel Williams as the charismatic host of The Montel Williams Show, but he's also pretty well known for serving in the United States Marine Corps, as well as the United States Navy. Unlike some of the other celebrities on this list, Williams served his country for many years and built an entire military career.
After graduating high school in 1974, Williams enlisted in the Marine Corps and remained there until he was honorably discharged in 1976. From here, he became a midshipman in the Navy and remained there for 13 years. Williams achieved so much throughout his 15-year military career: he worked for naval intelligence, became a public speaker, and rose to the rank of lieutenant commander. He also used his gift as a speaker to counsel the wives and families of servicemen.