Marisa Julia Siketa (born 7 November 1990) is an Australian actress, disc jockey, animal ambassador, and traffic manager. She is best known for her roles as the first actress to play Melanie Atwood on The Saddle Club and as Summer Hoyland on Neighbours.
Marisa Siketa was born in Geelong, Victoria, Australia. She joined Screen Actors Australia in 1998 and commenced training in the Geelong studio on weekends. She started off working as an extra on SeaChange and the children's TV series Horace and Tina.
She was cast as Summer Hoyland on Neighbours from 2002 to 2005 before reducing her role to a recurring one to concentrate on her school work and eventually leaving the series in 2007. In October 2009 it was announced the character of Summer Hoyland was being written back into Neighbours, though the role had been recast for unknown reasons. Siketa left The Saddle Club after Season 1 due to landing her role on Neighbours. Marisa was replaced by Jessica Jacobs. After leaving Neighbours, she appeared in various commercials.