She began her career at the age of 8, dubbing voices for television productions such as Babar. At the age of 12 she began her acting career in the film Comme un Voleur (1990).

Dhavernas portrayed swimmer Marilyn Bell in the made-for-television movie Heart: The Marilyn Bell Story (1999). Other notable films have included a leading role in Edge of Madness (2002), and supporting roles in Out Cold (2001) and Lost and Delirious (2001). She also had a notable role on Law & Order as a closeted, gay teenager who killed her girlfriend in the episode "Girl Most Likely" (12x17).

Her most high-profile work to date is as the central character in Wonderfalls. Dhavernas plays Jaye, an underachiever university graduate from a wealthy family who lives in a trailer and works at the Wonderfalls Gift Emporium, a Niagara Falls gift shop. One of the quirks of the show is Jaye's ability to hear inanimate objects speaking to her, and encouraging her to help other people. Dhavernas has des