The former husband and daughter of "body-in-the-suitcase" victim Annabelle Chen have been charged with her murder.

Police released a statement on Wednesday afternoon saying the 65-year-old man and a 25-year-old woman have been charged with Mosman Park woman's death.

The 57-year-old, whose body was found stuffed inside a suitcase in the Swan River on July 2, was understood to have been estranged from her two step-children, one who lived in Perth.

She was reported missing by her biological daughter, Tiffany Wan, who lives in Melbourne, two months after her death following an extensive public appeal from police to help identify her.