Rathna (Prasanna Lakshmi) was an Indian actress who predominantly works in Tamil, Malayalam, Telugu and Kannada film industries.
Rathna was the niece of actress G. Varalakshmi.
Rathna made her debut in Tamil movie Thozhilali (1964) when she was 15 years old. She gained recognition in Enga Veettu Pillai (1965) where she acted as a village girl. A popular duet song Naan Maanthoppil, set in folk melody with MGR in that movie sparked her role as the second lead heroine.
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