In 1989, Beth Chamberlin joined the cast of the CBS soap opera Guiding Light, where she played the character "Beth Raines" until early 1991. She rejoined the show, again as "Beth", in 1997 and has played her ever since.
In 2002, Chamberlin became an author when her novel, Lorelei's Guiding Light: An Intimate Diary was published by St. Martin's Press. The novel was written as the back-story for a Guiding Light storyline she had been involved in earlier that year, in which "Beth Raines" believed she was a woman named "Lorelei Hills".
Beth has been married to Peter Roy since 1994 and has one child, named Lucas.