Background characters

Background characters are people that appear very often, they are used on the show to fill crowd scenes.

Unnamed Pinhead Pierre actress
A girl that has been seen many times, including the title sequence of the Pinhead Pierre Show, a children's show from when Lawrence was a kid. She also was seen with a kite in "Phineas and Ferb: Across the 2nd Dimension" when Phineas and Ferb were singing Summer (Where Do We Begin?).

Bad Singing Kid
This characther first appeared in a commercial at the beginning of "Flop Starz" to demonstrate the minimum requirements needed in order to participate in a singing contest. He appeared again as the owner of the bike that Dr. Doofenshmirtz stole.

Cindy
Cindy is a child who appeared in "Unfair Science Fair".

Sassy Miss K
See Sassy Miss K for more information.

Woman #1
A woman that has been seen alongside two other background characters: the Ballpit Kid and the Unnamed Pinhead Pierre actress. She is likely the Ballpit Kid's mother because she is relieved when he was pulled out of the ball pit in "No More Bunny Business".

Physical appearance: brown hair. Wears a deep rose-colored dress with matching necklace and earrings.

Woman #2
A woman that has been seen alongside two other background characters: the Ballpit Kid and the Unnamed Pinhead Pierre actress. Her relationship to those two characters are currently unknown.

Physical appearance: brown hair. Wears blue slacks, shirt, hair band and earrings.

Timmy
"I did it."

- Timmy speaking on the "The Man-Eating-Dinosaur-Themed-Totally-Sick Water Slide of Doom" advert.

Timmy is a boy who is a frequent background character in the series. He also owns the world's fattest gerbil.

Physical appearance: Yellow spiky hair, red striped shirt and gray pants.

In "Comet Kermillian", he spoke for the first time. Technically, he didn't speak, but his mouth opened. The line couldn't be heard, as the audience was awing the laser show, but it does prove that he said something. In "The Best Lazy Day Ever", he spoke on the dinosaur slide advert.

Boy #1
A boy has appeared several times in the show. He may be Sassy Miss K's brother, since he was shown in the title sequence for Bust 'Em and that show is about gathering video evidence to bust your brothers. ("Leave the Busting to Us!")

Physical appearance: Black curly hair, two-tone green shirt, gray shorts, green and white shoes

Boy #2
A boy has appeared in several episodes in the show.

Physical appearance: brown hair, orange shirt, blue shorts, orange shoes, and he is fat.

Man #1
Physical appearance: brown hair, purple shirt, gray pants. Seen with the Ballpit Kid, catching a delivery of Fireside Girls Cupcakes. ("Fireside Girl Jamboree")