[citation needed] From 2002 to 2005, she played Emily Yokas on the NBC television show Third Watch.
In 2007, she joined the cast of the long-running CBS daytime drama Guiding Light in the role of Susan "Daisy" Lemay, a role she continued to portray until the end of Guiding Light's broadcast run in 2009.
In 2014, she was cast as one of the leads in a Fox comedy pilot executive produced by Matt Hubbard and Tina Fey, portraying the role of Thena;[1] but the series was later scrapped after a change in management at Fox.
[2] In early 2019, Dennison was cast as Jenny Kenney, the protagonist's daughter in the pilot of the hit CBS series Carol's Second Act starring Patricia Heaton.
[3] Following the pilot, Ashley Tisdale replaced Dennison in the role of Jenny.