Annie first appears in Halloween (1978) as a high school student babysitting Lindsey Wallace (Kyle Richards) who unwittingly encounters an escaped mental patient—Michael Myers.

In the original Halloween (1978), Annie is established with Lynda Van der Klok as one of Laurie Strode's best friends, and the daughter of Haddonfield's sheriff, Leigh Brackett.

Annie is walking home from school with her friends, talking about how her plans were ruined because of her boyfriend Paul being grounded for the night.

Lynda leaves the girls once she reaches her house and Laurie notices Michael watching her, and tells Annie of this and the latter goes to investigate, but discovers nothing.

When Annie's boyfriend, Paul, calls her to come and pick him up, she takes Lindsey over to the Doyle house to spend the night with Laurie and Tommy.

A grieving Sheriff Leigh Brackett, Annie's father, ends his involvement with assisting Dr. Loomis when he identifies his daughter's dead body.

Michael pulls her back inside, however, she manages to slip away and get a kitchen knife, attempting to face the towering killer.

Her resistance quickly ends with Annie captured alive, exposed to Michael's crueler attacks; she is left lying on the floor brutally tortured and bleeding when Laurie brings Lindsey home, although her father finds her still alive some time later due to Laurie having called 9-1-1.

On a Halloween night when she is at home alone, Michael breaks into the Brackett house, seizes the fleeing Annie then stabs her repeatedly off-screen.

Comics, the unstable Laurie, having assumed her brother's mantle, digs up the graves of Annie, Lynda and the latter's boyfriend Bob, placing their skeletons and headstones in Lindsey Wallace's house.

Annie's morgue report appears at the website HalloweenComics.com, revealing information such as her address, date of birth, and middle name, which was Marie.

It goes without saying nowadays that girls in horror films will be dispatched the moment their undergarments become visible, but it was a trend that Annie made famous.

"[9] In 2020, through a deal between Fourth Castle EMCE Toys, Compass International Pictures and Fright-Rags, Annie was an included character in the officially licensed Halloween Nanoforce® collection of figurines.