Brittany is a teenage girl with her blonde hair tied back in two ponytails and long bangs framing her face. She is typically seen in her royal blue and gold cheerleading uniform.
The stereotypical rich "popular" cheerleader, Brittany is the second-dumbest kid at Lawndale (the first being her boyfriend Kevin Thompson). She has more than her share of moments of gullibility and is easily distracted, but occasionally shows idiot-savant moments, like when planning a complex and successful paintball tactic.
Brittany is never mean on purpose but does show hidden feelings of naive self-respect, mostly towards Kevin. She usually imagines her future self as leaving him and becoming amazingly successful. As the series progresses, she starts to become friends with Daria and Jane, usually going to them for advice. After graduating, her unfaithful relationship with Kevin became in jeopardy. It is unknown if they broke up or not.
Brittany is generous, optimistic, friendly, manipulative, naive, and often seems like she is trapped in her own world. When Kevin is involved, she is by turns doting, worried, jealous, loving, and protective. She also has "come and go intelligence", because while ignorant and gullible, she can be shockingly sensible. She displays an aptitude for military tactics, is a decent actress with an above average memory, was accepted into Great Prairie State University, and receives favorable marks in Creative Writing.
In Partner's Complaint, she and Kevin had an argument over who was supposedly smarter and paired up with Jane and Mack respectively deciding to go through the process of purchasing a car for an economics project (Kevin copying from Jane's idea). It was proven then that Brittany was the smarter one due to Kevin believing that they actually had to purchase a car and doing so while leaving a cash down payment.
Jodie is Brittany's best friend, the two are always seen talking to each other, despite the fact that Jodie can be irritated by Brittany.
Despite not being friends, Daria and Brittany are almost constantly talking to each other. Brittany seeks Daria out for advice, homework help, and comfort, despite Daria being annoyed and uncomfortable. Once Brittany thought Daria was stealing her boyfriend Kevin Thompson, when they were working on a school project, when really Kevin was going over to Daria's house because she had a certain sports channel, and Quinn Morgendorffer was trying to steal Kevin. (Partner's Complaint)
Brittany and Kevin have a very turbulent relationship; the two often yell and fight with each other, and Brittany can be very jealous and possessive of Kevin. She worries about him interacting with other girls, but the two still maintain a very sexual relationship, losing their virginities to each other. Brittany marries Kevin, and the couple has three girls and two boys. Brittany is the weathergirl for Lawndale's local news station, and moonlights as a cheerleading coach at Lawndale High.
Brittany is the lead cheerleader at Lawndale High, and runs an advice column in the Lawndale Lowdown called Ask Brittany. She wanted to be a model, but gets turned down by the talent scouts. When Lawndale High opens a cafe, she has a brief stint as a Shakespearean actress, but when Kevin doesn't memorize his lines she retires. As an adult, she is a weathergirl for Lawndale's local news station, and moonlights as a cheerleading coach at Lawndale High.
- Brittany was modeled after Jenny McCarthy.
- In Latin America dubbing she was voiced by Claudia Motta.
- During the first few episodes of Season 1, Brittany's voice was noticeably softer and she spoke in a much less energetic fashion. This was likely changed to make her easier to hear and to fit in with her position as head cheerleader.