She is portrayed in the 1990 TV mini-series adaptation by Emily Perkins as the young version and Annette O'Toole as an adult.

In the film adaptions of 2017 and the 2019 sequel, Sophia Lillis and Jessica Chastain portray Beverly Marsh as the younger and adult version, respectively.

Ben writes her an anonymous love poem which states, "your hair is winter fire, January embers, my heart burns there too."

Beverly eventually joins "The Losers Club" and befriends Eddie Kaspbrak, Richie Tozier, Mike Hanlon and Stanley Uris.

After they escape the sewers, the Losers make an blood oath that if Pennywise hasn't been defeated, they will all return to Derry to finish him.

In her adulthood, due to the power of Pennywise and the town of Derry, Beverly forgets about The Losers Club and her childhood.

[4] The portrayal of Beverly in the 2017 film and its 2019 sequel by Sophia Lillis as a child and Jessica Chastain as an adult were much more positively received.

This interpretation shows Beverly as being the moral compass of The Losers Club and playing a key role in defeating Pennywise in both films.

A flashback in the 2019 film reveals that her mother has died when Beverly was young; her death is implied to have been suicide due to mental illness, possibly postpartum depression.

[8] Interestingly in the TV mini-series adaptation of '11/22/63' although the storyline in Derry and scenes with Beverly and Richie Tozier are omitted; Annette O'Toole (adult Beverly in the 1990 TV mini-series) appears as Edna Price - Jake Epping's landlady, in The Episode: "The Kill Floor", Set in Holden, Kentucky, which is a stand-in in-lieu of Derry, Maine.

[2][9][10][11][12][13][14][15][16][17] The scene in the novel where preteen Beverly has sex with the rest of the members of The Losers Club in the sewers of Derry after defeating Pennywise for the first time has become one of the more controversial in the novel.

The scene was reportedly meant to take place in Cary Joji Fukunaga's original screenplay, but was removed once Muschietti became involved.

As an adult, due to the repressed memories of Derry, she marries Tom Rogan, who is physically, sexually, and emotionally abusive towards her.

While this is most blatantly noticeable in the controversial sexual encounters in the sewers, Beverly also faces maturity in different ways throughout the novel.