Alexander began working in the adult industry as a stripper in Sacramento when she was 18 years old to supplement her daytime earnings as a receptionist. She appeared in several adult magazines with her first photo shoot being with Earl Miller. She started performing in adult films in 2001 beginning with a girl-girl scene in Hot Showers Number 2, and she became a contract girl for Sin City in that same year. In addition to a catalog of solely girl-girl hardcore work, she appeared in a handful of softcore erotic films produced by HBO and Cinemax such as Hotel Erotica, The Sex Spa, Sex House, and Voyeur: Inside Out. She also became a solo and girl-girl Internet nude model.
Alexander appeared in a mainstream film entitled Spider's Web with Stephen Baldwin and Kari Wuhrer in 2002.
Alexander was a contract girl for Vivid Entertainment from 2004 to 2009. After years of appearing only in girl-girl scenes, she began appearing in boy-girl scenes in 2005, including an interactive DVD and a feature role with Rocco Siffredi in Vivid's Lexie and Monique Love Rocco. She had her breasts augmented in December 2010. She was a Trophy Girl at the 2002 AVN Awards ceremony in Las Vegas.
She was invited to the Fox News show Red Eye w/ Greg Gutfeld to discuss a nonpartisan study that found that abstinence-only programs for teens do not work, whereas safe sex education programming was highly successful. Alexander discussed what being a Vivid Girl meant to her as well as her preference for hands-on sex education, which aired on November 10, 2007. On February 15, 2008, she and Ron Jeremy represented the industry in a debate at Yale University against pornography opponents Craig Gross (founder of the XXX Church) and Donnie Pauling, a former porn Producer, and the debate was aired on ABC’s Nightline.
She also appeared in the 2009 action film Crank: High Voltage.
In 2017, Alexander starred in a public Service campaign encouraging parents to discuss sexual health education with their children, noting that children are likely to see pornography at some point in their childhood, and need to be informed that what is portrayed in pornography is an unrealistic representation of sexual behavior.