Radhika Thilak was an Indian Malayalam-language playback singer. She sang 70 songs for Malayalam films.
Radhika was married to Suresh since 1992. The couple had a daughter, Devika. Noted singers Sujatha Mohan & G. Venugopal are her cousins.
Some of her noted songs are "Arunakirana deepam", "Deva sangeetham", "Maya manchalil", "Kaithapoo manam", "Thiruvathira thira nokkiya", "Ente ulludukkum kotti" and "Ninte kannil". She is well known for the song Sarakku Vechirukken from the movie Shahjahan. Apart from film songs, she also sang devotional songs. She was also a noted TV anchor.
On 20 September 2015, Radhika was admitted to a private hospital in Kochi in the evening and was declared dead at around 8 pm. She was 45. Radhika had been undergoing treatment for cancer for nearly two years.