Ronald Jeremy Hyatt (born March 12, 1953) is an American former pornographic actor.

Nicknamed "The Hedgehog", Jeremy was ranked by AVN at No. 1 in their "50 Top Porn Stars of All Time" list. Jeremy has also made a number of non-pornographic media appearances, and director Scott J. Gill filmed a documentary about him and his legacy, Porn Star: The Legend of Ron Jeremy, released in 2001.

Jeremy was accused of sexual assault more than a dozen times between 2017 and 2020, for incidents stretching back to 2004. In June 2020, Jeremy was charged with four counts of rape and sexual assault involving four women, and in August 2020, he was charged with another 20 counts of either rape or sexual assault over a span of 16 years from 2004 to 2020 that involved 12 women and a 15-year-old girl. Upon further investigation he was indicted on 30 sexual-assault counts involving 21 victims. He was initially jailed awaiting trial, but in January 2023, a judge found him mentally unfit to stand trial due to "incurable neurocognitive decline"; he was released to a private residence in November 2023.