Jeff is the original purple Wiggle and a founding member of The Wiggles. He was the purple Wiggle for 21 years before being replaced by Lachlan Gillespie in 2013. His actor with the same name has since made cameos in some episodes of Ready, Steady, Wiggle! and still occasionally performs in reunion concerts as the purple Wiggle. However, starting in 2020, he has resurfaced in the series in place of Lachy for the Wiggly World of Dance classes while Lachy focuses on the arrival of his newborn twins.
Jeff tends to fall asleep a lot, which causes the others to call out "1, 2, 3, WAKE UP JEFF!", and that causes Jeff to jump up and down and do all sorts of silly things.
Jeff plays a variety of key instruments such as the piano, keyboard, accordion, and occasionally other instruments like drums or guitar. Out of the original generation, he sings the least, only having a few lead songs like Would You Giggle, I'm a Cow and I Just Can't Sleep on Christmas Eve!.
- He is the oldest Wiggle of the original generation.
- He is the shortest and skinniest male Wiggle.
- He is the only Wiggle who isn't married, engaged or in any romantic relationship.
- He eats cereal with bananas for breakfast.
- His favourite food is broccoli.
- He is the only Wiggle who never played the Red Starry Guitar.
- His favourite keyboard is the Red Starry Keyboard.
- He likes sleeping at odd times.
- He is currently the only Wiggle not clad in the yellow skivvy to drive the Big Red Car.
- As is shown in Surfer Jeff, he is a keen surfer.
- Jeff Wiggle returned for a short time in a four part series in series 2 of Wiggly World of Dance.
- In Space Dancing! he told Greg, Anthony and Murray that he reckons he can sleep anywhere.
- He shares a birthday with Ryan Yeates.
- He wore his pyjamas in 6 videos: Big Red Car (video), Wake Up Jeff! (video), Sing a Song of Wiggles (video), It's Time to Wake Up Jeff! (video), It's Always Christmas With You! (video) and Pop Go The Wiggles! (video), as well as 8 episodes: Anthony's Friend, Work, Wiggle Opera, Imagination, Cows and Ducks, Play (a.k.a. At Play) Nutrition and Wiggle Food.
- He sleepwalked in 3 videos: The Wiggles Movie, Yummy Yummy (1998 video) and Wake Up Jeff! (video), as well as 4 episodes: Zardo Zap (episode), Family, Cows and Ducks and Nutrition.
- In Spanish he is voiced by Pablo Salla.
- In Jeff the Mechanic, he fixes the Big Red Car after he accidently sends the mechanic, Ginger, away.
- He narrates the book Go to Sleep, Jeff! A Bedtime Story.
|The Wiggly Group||Anthony Wiggle - Lachy Wiggle - Simon Wiggle - Emma Wiggle - Dorothy the Dinosaur - Henry the Octopus - Captain Feathersword - Wags the Dog - Shirley Shawn the Unicorn|
|The Former Wiggles||Murray Wiggle - Jeff Wiggle - Greg Wiggle - Phillip Wiggle - Sam Wiggle|
|Minor Characters||Officer Beaples - The Wagettes - The Wiggly Dancers - Hot-Pots The Oven - Foodman - Paul the Cook - Flora Door - The Little Wiggles - Magdalena the Mermaid - Professor Singalottasonga - Santa Claus - Ringo the Ringmaster - Wally the Great|
|Guest Stars||Lee Hawkins - Steve Irwin - Kylie Minogue - Al Roker - Leo Sayer - Robert Rakete - Ross Wilson - Alfonso Rinaldi - Daryl Somers|