Alexander John Rebar (July 9, 1940 – November 19, 2021) was an American producer, writer and actor. He was most known for starring in the cult film The Incredible Melting Man.

He was born in Dallas, Pennsylvania on a farm where he rode horses. He attended Valley Forge Military Academy and Wilkes College before enlisting in the Navy as a Photographers Mate. After serving in the Korean War he moved to Paris where he co-founded and acted with the Studio Theater of Paris and managed a jazz club.

In Rome, Rebar worked for Production Cinitalia Edizone doing voice dubbing for Marcello Mastroianni, Klaus Kinski and the Italian version of Mighty Mouse. He went on to write Beyond the Door and made his star turn as the Incredible Melting Man.

Through the 1980s Rebar went on to numerous television appearances in The Young and the Restless, Days of Our Lives, Murder, She Wrote, CHiPs and Amityville 4: The Evil Escapes while simultaneously writing and producing infamous cult films such Demented, Santa Claus slasher film To All a Goodnight, horror/rock documentary Terror on Tour, and Thanksgiving slasher film Home Sweet Home.

In the early 2000s he briefly came out of retirement to begin producing videos for the internet including a series called "Sex, Pain and Murder" for iFilm.