Jimmie Walker

Walker was born in Brooklyn, New York and raised in the Bronx. He attended Theodore Roosevelt High School in New York City. Through a New York State funded program known as SEEK (Search for Education, Evaluation, and Knowledge), he continued his studies and entered into the field of radio engineering with WRVR. As a young man, Walker was a vendor at Yankee Stadium, starting with the 1964 World Series.In 1967, Walker began working full-time with WRVR, the radio station of the Riverside Church. In 1969, Walker began performing as a stand-up comedian and was eventually discovered by the casting director for Good Times, after making appearances on Rowan & Martin's Laugh In and on the Jack Paar Show. He eventually released one stand-up comedy album during the height of his Good Times popularity: Dyn-o-mite on Buddah Records (5635). During Good Times' 1974–75 season, Walker was 26 years old, though his character was much younger. John Amos, the actor who portrayed Walker's father on Good Times, was actually just eight years older than Walker.

Walker credits producer/director John Rich for inventing "Dyn-o-mite!" which Rich insisted Walker say on every episode. Both Walker and executive producer Norman Lear were skeptical of the idea, but the phrase and Walker's character caught on with the audience.

Off- and on-camera, Walker did not get along with the series' lead, Esther Rolle, because she and Amos disapproved of Walker's increasingly buffoonish character and his popularity, and Walker felt hurt by their disdain. Dissatisfaction led Amos (before Rolle), to leave the show, making Walker the star of the show. Walker was the only Good Times star to not attend Rolle's funeral.

During 1975 Walker was also a weekend personality on contemporary R&B music station KAGB 103.9 FM licensed to Inglewood in the Los Angeles market.

Walker appeared on The Tonight Show and Match Game during the 1970s and early 1980s. He was a five-time panelist on the Match Game-Hollywood Squares Hour from 1983 to 1984. He also appeared on the 1990 revival of Match Game and various game shows during that era.

Walker has made guest appearances on Badge 373, The Love Boat, Fantasy Island, The Larry Sanders Show, Son of the Beach, The Drew Carey Show, The John Larroquette Show, In the House, Cagney & Lacey, The Fall Guy, Scrubs, Star Dates, Everybody Hates Chris, George Lopez, Chelsea Lately and Lincoln Heights. He also appeared in the films Rabbit Test (1978), The Concorde... Airport '79 (1979), Airplane! (1980), Water (1985), Doin' Time (1985), The Guyver (1991), Monster Mash (1995) and Plump Fiction (1997).

Aside from guest appearances, he starred in the short-lived television series At Ease in 1983 and Bustin' Loose in 1987.

In the 1990s, Walker returned to his radio roots hosting shows on WHIO, WOAI, WLS, and KKAR. In 1996, he appeared on split release with Powerviolence band Spazz distributed by Spazz owned label Slap-a-ham records.

In 2010, Walker made a cameo appearance in the movie Big Money Rustlas. In 2011, he appeared in a Syfy channel movie Super Shark. May 4, 2023 made a guest appearance on The Bold and the Beautiful.

In 2012, Walker's autobiography, Dyn-o-mite! Good Times, Bad Times, Our Times – A Memoir, was published. In 2012, Walker announced the release of his official app developed by Monty Goulet for iOS.