Kala Keerthi Sybil Wettasinghe () (31 October 1927 – 1 July 2020) was a Sri Lankan children's book writer and an illustrator. Wettasinghe wrote more than 200 children's books which have been translated into several languages. Two of her best known works are "Child In Me" and "Eternally Yours". She was born in Galle, Sri Lanka.