Tremors is a 1990 American monster horror film directed by Ron Underwood, produced by Brent Maddock and S. S. Wilson, written by Maddock, Wilson, and Underwood and starring Kevin Bacon, Fred Ward, Finn Carter, Michael Gross, and Reba McEntire.

In the film, handymen Val McKee (Bacon) and Earl Bassett (Ward) wish to leave the small desert town of Perfection, Nevada, as they are tired of their dull lives. However, they happen upon a series of mysterious deaths and a concerned seismologist Rhonda (Carter) studying unnatural readings below the ground. With the help of eccentric survivalist couple Burt and Heather Gummer (Gross and McEntire), the group fights for survival against giant, prehistoric, worm-like monsters hungry for human flesh.

Released by Universal Pictures, the film is the first installment of the Tremors franchise and was followed by five direct-to-video sequels and one prequel: Tremors 2: Aftershocks (1996), Tremors 3: Back to Perfection (2001), Tremors 4: The Legend Begins (2004), Tremors 5: Bloodlines (2015), Tremors: A Cold Day in Hell (2018), and Tremors: Shrieker Island (2020). A television series titled Tremors: The Series aired from March through August 2003. A second television series was set to air in 2018 after a pilot had been shot with Bacon reprising his role for the first time since the original film, but multiple networks including Syfy passed on the series.