Acting

Lopez began acting in 1984 when he appeared as younger brother Tomás in the short-lived ABC comedy series a.k.a. Pablo.^[9] That same year, he was cast as a drummer and dancer on Kids Incorporated; he performed on three seasons. In March 1987, he was cast as a guest star on the sitcom The Golden Girls as a Latino boy named Mario who faces deportation. He was cast in a small part in the film Colors (1988) as Felipe's friend.

Lopez was cast in 1989 as A.C. Slater in the television Saturday-morning series sitcom Saved by the Bell (1989–1993), and its spinoff Saved by the Bell: The College Years (1993–1994), a role which lasted five years.^[10] On February 4, 2015, Lopez reunited with Mark-Paul Gosselaar, Elizabeth Berkley, Dennis Haskins, and Tiffani Thiessen on The Tonight Show Starring Jimmy Fallon, where they appeared in a Saved by the Bell sketch with Fallon.^[14] In 2020, Lopez reprised the role of A.C. Slater in Peacock's sequel series, Saved by the Bell.^[15]

In 1997, Lopez starred as Olympic diver Greg Louganis in the television film Breaking the Surface: The Greg Louganis Story. The following year, he was cast as Bobby Cruz in the USA Network series Pacific Blue for two seasons before it was canceled after the fifth season; he then went on to guest star on Resurrection Blvd., Eve, and The Bad Girl's Guide. In March 2006, Lopez joined the cast of the daytime soap opera The Bold and the Beautiful playing the role of Dr. Christian Ramirez. On July 18, 2006, he was released from his B&B contract.^[16] Later that year, Mario guest-starred as a plastic surgeon who drives Christian Troy to jealousy when he sees him naked in the shower in an episode of FX Network's Nip/Tuck during the show's fourth season, which began in autumn 2006. He also made an appearance on George Lopez as a police officer in late 2006.

Also in the fall of 2006, Lopez signed on as a contestant on the third season of Dancing with the Stars on ABC with professional partner and then-girlfriend Karina Smirnoff who was making her series debut. They finished in second place, losing to the team of Emmitt Smith and Cheryl Burke.

Lopez and Courtney Mazza had a reality show on VH1 called Mario Lopez: Saved by the Baby which premiered on November 1, 2010.^[17] Lopez guest-starred as a reporter for Extra Sesame Street in the Sesame Street episode "The Veggie Monster" in 2012.

In December 2020, Lopez starred as Colonel Sanders in A Recipe for Seduction, a short film from Lifetime and KFC.^[18][19] In 2024, Lopez signed a multi-year deal with Great American Media.^[20][21]

Hosting duties

In 1992, he hosted his first series on NBC, called Name Your Adventure. He hosted the serial tabloid Extra, as well as the MTV reality shows America's Best Dance Crew and MTV's Top Pop Group. In the 1995–96 season, he hosted the second season of Masters of the Maze on what was then The Family Channel. Lopez is both the host (with Carmen Palumbo) and co-executive producer of Sí TV's Dating Factory. From October to December 2012, he co-hosted the Fox singing competition The X Factor along with Khloe Kardashian.^[22] In September 2013, Lopez returned to the show as sole host for season 3 after Kardashian was not asked back as co-host.^[23] The X Factor was cancelled on February 7, 2014.^[24] From 2002 to 2005, he was the host of the Animal Planet show Pet Star, despite some difficulty with an allergy to cats.^[25] Lopez hosted the Miss America pageant in 2007, 2009, and 2010.

Lopez has guest co-hosted The Wendy Williams Show,^[26] and MCed the gala benefit for the 2010 Pageant of the Masters arts festival in Laguna Beach, California.^[27]

Starting in 2012, Lopez began hosting his own nationally syndicated radio show, ON With Mario Lopez, for Premiere Radio. It streams online daily on iHeartRadio and airs on selected CHR and Hot AC stations (particularly on KBIG-FM/Los Angeles) throughout the U.S.

In August 2014, Lopez began hosting the Hot AC edition of the iHeartRadio Countdown.

In July 2019, it was reported that Lopez would be leaving his duties hosting Extra in order to host rival program Access Hollywood.^[28] In November 2019 Lopez was the Grand Marshal of the Hollywood Christmas Parade.

In 2024, Lopez began hosting the Game Show Network series Blank Slate.^[29]

Stage career

Outside of TV, Lopez made his Broadway debut on April 15, 2008, in the revival of the musical A Chorus Line as Zach.^[30][31]

Books

Lopez has published three non-fiction books. The first, Mario Lopez Knockout Fitness, was published in 2008 and written together with Jeff O'Connell (who had previously written a fitness book with LL Cool J).^[32] His book Extra Lean followed in early 2010 and became a New York Times bestseller.^[33] Extra Lean Family was published in May 2012.^[34] He released a children's book entitled Mario and Baby Gia by Celebra Children's Books (a division of Penguin Books), on September 27, 2011. The book is about Lopez and his daughter.^[35][36]

Musical

In 2022, it was announced that Lopez is involved in an effort to revive the Puerto Rican boy band Menudo, as he oversaw auditions that took place, in a project named "Menudo: A New Beginning".^[37] Lopez helped revive the band as their new manager, and in 2023, Menudo released their first single under Lopez, named "Mi Amore".^[38]

Film

Television