The Flintstones in Viva Rock Vegas is a 2000 American romantic comedy film directed by Brian Levant, written by Jim Cash, Harry Elfont, Deborah Kaplan, and Jack Epps, Jr., and is the prequel to Levant's The Flintstones (1994), based on the 1960–1966 animated television series of the same name.

The film stars Mark Addy as Fred Flintstone, Stephen Baldwin as Barney Rubble, Kristen Johnston as Wilma Slaghoople, and Jane Krakowski as Betty O'Shale, replacing John Goodman, Rick Moranis, Elizabeth Perkins, and Rosie O'Donnell respectively.

William Hanna and Joseph Barbera, who created the original cartoon series, make cameo appearances at the end of the film.

In prehistoric suburban Bedrock, young bachelors and best friends Fred Flintstone and Barney Rubble have recently qualified as crane operators at Slate & Company.

Meanwhile, Wilma Slaghoople, the daughter of a wealthy military veteran, wants a normal life, though her controlling mother Pearl wants her to marry suave casino owner Chip Rockefeller.

She runs away from home and meets waitress Betty O'Shale at the restaurant Bronto King in downtown Bedrock.

Smitten with the waitresses, the two men invite them to a carnival, with Fred dating Betty and Barney taking Wilma.

Gazoo visits the men in prison, revealing that Chip is severely indebted to the mob and hopes to solve both his problems by framing Fred for the robbery and marrying Wilma to get his hands on the Slaghooples' money.

When Jagged sings "Viva Rock Vegas" at a party, Betty catches Wilma's tossed bouquet and kisses Barney.

The newlyweds drive away with Dino and Gazoo to goodbye waves from their friends, family, and even a handcuffed Chip and Roxie.

[7] John Goodman, Rick Moranis, Elizabeth Perkins, and Rosie O'Donnell, who played Fred, Barney, Wilma, and Betty respectively in the first film, did not reprise their roles.

[10] Ann-Margret, who had a guest appearance on the original animated series as the title character in "Ann-Margrock Presents", sings the theme song, a slightly rewritten version of Viva Las Vegas.

[14] On Rotten Tomatoes, The Flintstones in Viva Rock Vegas has a 25% score, based on 72 reviews, with an average rating of 4/10.

The site's critical consensus states: "The prequel to the first full-length feature set in Bedrock, Viva Rock Vegas is a surprising improvement over The Flintstones.

Aimed towards an audience of adults and children alike, critics feel Viva will appeal to a broad range of viewers.