Hoover was born and raised in Colbert, Washington. She is the oldest of four siblings. She started taking dance classes at the age of two and starred in school plays and appeared in local commercials as a child. She was accepted to Loyola Marymount University’s theatre program in Los Angeles and graduated with her BA in theatre.Hoover got her start playing Cami on the web-based soap opera Sam Has Friends in 2006. From there she has gone on to have parts in the TV series Sorority Forever, How I Met Your Mother, Happy Endings, Anger Management, Two and a half Men and the 2014 film Guardians of the Galaxy. She also had a regular role on the web-series Sorority Forever as Madison Westerbrook in 2008.