Marisa Julia Siketa (born 7 November 1990) is an Australian actress who played Summer Hoyland on the Australian soap opera Neighbours from 2002 to 2007.

Marisa was born in Geelong. 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. In season 1 of The Saddle Club, she played Melanie, Lisa's younger sister.

She was a regular cast member of 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 has been recast for unknown reasons. Siketa played Melanie Atwood #1 on The Saddle Club on the ABC for the show's first season, but due to landing her role on Neighbours, she was replaced by Jessie Jacobs.

Siketa has two older siblings named Clinton and Nicole. She is of Croatian descent and speaks the language fluently. In 2008, Siketa was nominated for Miss Croatia Geelong 2008.^{[citation needed]}. She works at 95.5 K-ROCK Geelong as an presenter with a show 10 am weekdays. when she was on the saddle club she didnt apear much.