Cleo Massey

Cleo Massey (born 19 November 1993) is an Australian actress. She is best known for her portrayal of Kim Sertori in the television series H2O: Just Add Water. Massey has been performing on TV and film since the age of 11. In 2010, she was cast in the feature-length film The Little Things directed by Neil McGregor. In 2015, Massey began a blog called Pass Around the Smile, based around living a positive life. Pass Around the Smile has since expanded into events, courses, online meditations and Positive Guidance cards.

Early life Massey was born in Launceston, Tasmania. Her mother, Anna Waters-Massey, is an actress and acting teacher. Massey attended her classes while growing up. She has a younger brother, Joey.

Personal life Massey got married in December, 2021, to Luke Dempsey-Ceh, her partner of ten years. She announced her pregnancy in September 2023 via Instagram. In March, 2024, she gave birth to her daughter, Indigo Valerie Dempsey.

Filmography Feature film The Little Things (2010) – Young Dee Beat (2022) – Annie

Television Mortified (2006) – Brittany's Cheer Squad Monarch Cove (2006) – Drowning Girl H2O: Just Add Water (2006–2010) – Kim Sertori The Bureau of Magical Things (2018) – Sophie Apple Cider Vinegar (2025) - Kim Stage Mums (2018) - Shenaya Dicker

Short films Futility (2010) – Jade McIntyre Humidity Rising (2006) – Chrissy