Julianna Guill (born July 7, 1987) is an American actress.

Guill was born in Winston-Salem, North Carolina and graduated from R.J. Reynolds High School in 2005; she attended New York University before moving to California.

She has made numerous guest appearances in television series such as One Tree Hill, CSI: Miami, 90210,How I Met Your Mother and CSI: Crime Scene Investigation.

In 2009 she appeared in the independent Straight-to-DVD Teen Comedy film Costa Rican Summer which was released July 16, 2009 to negative reviews. Costa Rican Summer is due on DVD May 25, 2010. She also starred in a small roles in 2 Dudes and A Dream and Fired Up.

In 2009 she appeared in a leading role of Katy in Road Trip: Beer Pong. The film which was released Straight-to-DVD August 11, 2009. The film is a sequel to the 2000 Comedy film Road Trip.

In 2008 it was announced Julianna has been attached to the 2009 modern reboot of Friday The 13th. The film directed by Marcus Nispel co-starred Amanda Righetti and Jared Padelecki. Friday the 13th opened to with $40 million debuting at #1 at the US Box Office. The film earned over $91 million worldwide. She appeared in her first nude scene in a sex scene between her and Travis Van Winkle.