Actresses portraying Velma Nicole Jaffe was the original voice of Velma, and portrayed the character in both Scooby-Doo, Where Are You! (1969-72) and The New Scooby-Doo Movies (1972-74). Jaffe married and retired from acting in 1974, and when Scooby-Doo resumed production in 1976, Patricia Stevens was brought in as Jaffe's replacement. Stevens was replaced by Marla Frumkin mid-way through the 1979-80 season of Scooby-Doo and Scrappy-Doo (1979-1980). Frumkin voiced the character in four more episodes of Scooby-Doo and Scrappy-Doo before Velma was dropped from the series. Velma later returned as a semi regular character in four episodes of The New Scooby-Doo Mysteries, with Frumkin again voicing the character.
Christina Lange voiced preteenage Velma in A Pup Named Scooby-Doo from 1988 to 1991, and B. J. Ward voiced the character in several direct-to-video films from 1997 until 2002. Mindy Cohn, formerly a lead actress on the 1980s TV sitcom The Facts of Life, has voiced Velma from 2002 to the present. Velma was portrayed by actress Linda Cardellini in the two Scooby-Doo live-action movies, Scooby-Doo and Scooby-Doo 2: Monsters Unleashed. Jaffe returned to voice Velma in 2003 direct-to-video films.
Velma is 15 years old. Velma often makes great use of her skills in such areas as reading Chinese, deciphering scientific formulas, operating communications equipment, and so forth. A running gag of the series is Velma's trouble with keeping her glasses on her face (usually from being accidentally knocked off while being chased by the villain), as she is myopic. Her catch phrase is "Jinkies!" When Scooby (or Shaggy) is too afraid to volunteer for a mission (which tends to be most of the time), Velma often offers them a dog treat called a Scooby Snacks as a bribe. Velma also had an attraction to Johnny Bravo but confessed that she preferred to solve mysteries. In Scooby-Doo! Mystery Incorporated she's going out with Shaggy.
"What a Ham!'
"Are you thinking what i'm thinking."
"Would you do it for a Scooby Snack?"
"My Glasses! I can't see without my glasses!"
- Mr. Dinkley: (father).
- Mrs. Dinkley: (mother)
- Cousin Thelma: Works with dolphins at a marine institute.
- Cousin Thelma: Studies Egyptian Tombs.
- Dave Walton: (uncle).
- Uncle John: an archaeologist.
- Uncle Cosmo: another archaeologist.
- Uncle Elmo: a doctor.
- Aunt Meg: Who lives with Uncle Evan.
- Uncle Evan: Who lives in a small town.
- Marcy: Velma's cousin, the daughter of Meg and Evan.
- Madelyn: Velma's younger sister.