She is best known for voicing Artemis Crock on Young Justice, Eep on Dawn of the Croods and Audrey on Harvey Girls Forever!.

In 2008, Lemelin began voice-over work, playing an animated character in the DreamWorks' Kung Fu Panda franchise, as well as voicing several commercials.

[citation needed] As of 2011, in addition to acting in several studio and independent films (Playdate,[4] WER, Get the Gringo, Absolute Fear, and The Republic of Two), Lemelin has been cast in 12 consecutive TV pilots (several of which went to series), including Men at Work (TNT),[1] $#*!

Her network television debut was on the critically acclaimed but short-lived Fox show Undeclared, in which she was cast one month after moving to Los Angeles.

[1][6] Since 2002, she has regularly volunteered with Los Angeles-based Free Arts for Abused Children, and she is a regular volunteer for Best Friends Animal Society, including for its Pup My Ride program,[7] which transports small dogs from high-kill animal shelters to other parts of the United States where there is a greater demand for small dogs.