Rainbow) is a 1999 Indian Malayalam-language romantic thriller film directed by Dinesh Baboo.

One day, Vijay Krishnan, a poet and Mahesh's childhood friend, visits them.

Vijay is depressed as his girlfriend Neena died due to cancer.

Mahesh takes Vijay to a cliff and asks him to change his mind and go back home.

The soundtrack of Mazhavillu especially the songs "Ponnolathumbil" and "Raavin Nilakkayal" were well received.