She was born on August 10, 1992 in a taxi cab, #804 in New York City. She was born from Theresa and Jerry Russo. She is the second child of the three Russo children. Alex grew up with two brothers and her best friend, Harper Finkle.
Alex is, by ordinary standards of beauty, an extremely pretty girl with a self-proclaimed great fashion sense. She has her mother's wavy, dark brown hair and dark eyes, though she straightens it out in Season 2. She is petite and has a slim build. She usually wears her hair down, but can be up in some episodes. She is very stylish, as well. Many boys are attracted to her because of her looks, as well as her personality, in most of the episodes, she is wearing boots. Alex is a bit of a tomboy. For example, in "Alex's Choice", she wore a pretty dress to Gigi's tea, along with a pair of leggings and sneakers, so that she doesn't look too girly. Also, in "Quinceañera", she didn't like the dress she was wearing, because she thought it was too pink and poofy.
Unlike her brother Justin, she is not overly studious nor is she an academically gifted student who performs well in school. Rather, she relies more on her street-smarts than academics. She's very manipulative, using everyone's weaknesses to her advantage (like exploiting her father's love for food so he allow her to go to SS Tipton marine school). One of her flaws is her own reliance on magic and her laziness, which often results in magical troubles, as well her lack of disregard for rules.
She has a tendency to be very lazy, when given the option of the easy way and the proper way she will pick the easy way every time without hesitation, getting her into trouble often, because the easy way always has consequences she doesn't bother to think about until they're upon her. She also hates reading, even menus and just points at the pictures of what she wants, this is so widely known about her that the entire school stopped and stared in shock when she as much as picked up a book. The only subject she takes seriously and actually likes is art, which she shows deep admiration for in "Art Teacher" and "Paint By Committee". Her special symbol is Peace Signs.
Alex is typically portrayed as a mischievous troublemaker. She is usually unintentionally mean and exercises mocking judgment towards others she isn't very familiar with, an example of a situation being the time Harper asked her why she shouted at the guitarist who once played his guitar in front of a restaurant, to which she responded scathingly with, "Singing about losing his girl? Oh wah, wah, he was playing guitar in front of a restaurant, no wonder she's gone!" Her parents describe her as someone who only cares about herself, and Justin describes her as a "snarky, apathetic slacker," and she caused lots of troubles during the first and second season and had her brother fix it most of the time, but in the third season she rarely causes any magical problems anymore, often being one of the ones who fix the problems in the end, though still keeps her reputation.