Alex Whitney is a popular "grown-up" girl in Lisa Simpson's class.
Alex is quite a "mature" girl for her age. She has a mobile phone, purse, credit cards and enjoys dances. She pierces her and her friends ears with the help of thumb tacks and a whole lot of paper towels. She enjoys shopping on credit and dating. Her favorite scent is Calvin Klein's Pretension and favorite drink is iced tea. She uses slang usually reserved for older girls. She mentions her parents are extremely rich. She always has lip gloss, perfume and a spare pair of platform shoes in her pink fuzzy back pack. She's a bit spoiled however her looks make up for that.
She was seen lining up for a gymnastics class with Lisa, and joined a Tap Dancing school owned by Vicky Valentine.
 Behind the Laughter
In "Lard of the Dance", Alex Whitney is voiced by Lisa Kudrow, who played Phoebe in the sitcom Friends. Coincidentally, she also tells Lisa at one point to "not be such a Phoebe."