She stars in the BBC children's comedy series, Sorry I've Got No Head, alongside William Andrews, James Bachman, Marcus Brigstocke, Mel Giedroyc, Marek Larwood and Nick Mohammed. In December 2008 Crilly was nominated for a British Comedy Award as Best Female Newcomer for her portrayal of Magda in Lead Balloon, but lost out to Katy Brand. In 2007 she appeared in episode 78, "Susan of Troy", of My Family as an assistant on The Weakest Link. She also appears as "woman" in Ricky Gervais' comedy Extras as an extra herself (series 2, episode 5). She has also starred in Pixelface, a comedy for children, as a waitress zombie slayer called Claire Parker.