Rex Smith (born September 19, 1955) is an American actor and singer. Smith made his acting debut in the Broadway musical Grease in 1978. He is noted for his role as Jesse Mach in the 1985 television series Street Hawk and for being the first actor to play the Marvel Comics superhero Daredevil in live action. During the late 1970s, Smith was popular as a teen idol. He was featured regularly in 16 Magazine and Tiger Beat. He also had a gold top 10 single, "You Take My Breath Away", in 1979.

In the early 1970s, Smith was the lead singer for a band from Atlanta called Tricks and later a band named Phaedra. Smith next sang vocals in a hard rock band called Rex.

In 1979, he had a hit single from the television film Sooner or Later, entitled "You Take My Breath Away", which reached No. 10 on the Billboard Hot 100. It is on the platinum-selling album Sooner or Later, which is also named after the film. The music for this song was written by Stephen J. Lawrence and the lyrics were written by Bruce Hart. For many years, it was a staple on the play lists of FM radio stations with a soft rock or "lite" format.

In 1981, Smith hit the top 40 again with a remake of "Everlasting Love", in a duet with singer Rachel Sweet. Peaking at No. 32, the song is Smith's last charting hit to date. The song also became Smith's only hit on the UK Singles Chart, peaking at No. 35.

Smith performed live at the 1982 Miss Universe pageant main event night, held in Lima, Peru.

His latest album was released in 2000 and entitled Simply...Rex. It was re-released in 2006 and re-titled You Take My Breath Away.

In 2016, Rex performed in the Philippines at the Kia Theatre, Araneta Center.

Smith is best known for his role as motorcycle police officer Jesse Mach in the short-running 1985 television series Street Hawk, but he has also made guest appearances on a variety of television shows, such as The Love Boat, Baywatch, Caroline in the City and JAG. Smith has been a celebrity spokesperson for a number of corporate entities.