Dash played Dionne Marie Davenport in the 1995 feature film Clueless and its television series of the same name.

Other television work by Dash includes appearances in the series CSI: Crime Scene Investigation, Single Ladies and the reality TV show Celebrity Circus.

Born in the Bronx borough of New York City,[1] Dash is of African-American and Mexican descent.

After the television series ended, she appeared in View from the Top (2003) and smaller budget films, including Gang of Roses (2003), and Getting Played (2005).

She also has appeared in small guest roles on television shows such as Eve and CSI: Crime Scene Investigation.

[13] Between 2005 and 2007, she completed filming roles in I Could Never Be Your Woman, Nora's Hair Salon II, Fashion Victim, Ghost Image and American Primitive.

In 2011, Dash starred in the first season of VH1's first scripted series, Single Ladies, playing Valerie "Val" Stokes, described as a "'good girl' looking for a good man".

[20] On May 28, 2014, Fox News announced that Dash had been hired as a contributor for "cultural analysis and commentary.

In response to critical online comments she received for supporting Romney, Dash stated it was her opinion[30] and that she did not understand the vitriol.

[28] Vice presidential candidate Paul Ryan thanked Dash for supporting his ticket.

[35] On joining the race, Dash said she wanted to "free people from the shackles of a plantation mentality.

[37] On March 11, 2021, Dash stated in an interview with Daily Mail, "Being a supporter of Trump has put me in some kind of box that I don't belong in.

[5][39] From 2005 to 2006, Dash was married to British executive James Maby, CEO of Sports Logistics.

She has at various times revealed that she was molested as a child by a family friend, was addicted to cocaine in her teens and 20s, and has a history of being with physically and emotionally abusive partners.

[45] She is supportive of the right to keep and bear arms, crediting the use of a gun with saving her life after being sexually assaulted at gunpoint by an ex-boyfriend, because she was able to retrieve her own weapon, a .22 revolver, and shot at him, scaring him away.

[46] Dash was arrested on September 29, 2019, at her apartment in Pasco County, Florida, on a domestic battery charge after an argument with her husband, Jeffrey Marty.

[47] She pleaded not guilty,[48] and the case was dropped on October 3 at the request of Marty, who said Dash had been arrested over his objection.

[50] In October 2021, Dash opened up about her Vicodin addiction on The Dr. Oz Show, stating that she was five years sober.