From 2001 to 2002 Davidson played Cammie Morton on the TV series So Little Time. Her best known role came as Kerry on the ABC TV series 8 Simple Rules from 2002 to 2005. The series also starred Katey Sagal, Kaley Cuoco, David Spade, and John Ritter. Ritter passed away shortly after the production of an episode of the show. Amy has appeared in episodes of Judging Amy, Malcolm in the Middle, CSI: NY, Criminal Minds, Ghost Whisperer, House M.D., Vegas, and Major Crimes. She starred opposite Betty White in the 2005 Hallmark Channel movie Anne’s Point. In 2010 Amy married actor Kacy Lockwood, but has since filed for divorce.