Happy Birthday (Sinhala: හැපි බර්ත් ඩේ) is a 2022 Sri Lankan Sinhala action mystery thriller directed by Aruna Jayawardena, produced as a Stein Film by The Capital Maharaja Organization Limited, and released by M Entertainments. Dilhani Ekanayake and Isuru Lokuhettiarachchi play the key parts, with Tashi Kalidasa, Yohani Hettiarachchi, Surya Dayaruwan, and Randika Goonetileke playing supporting characters.
- Dilhani Ekanayake as Nita Saparamadu
- Tashi Kalidasa as Natalie, Nita’s eldest daughter
- Isuru Lokuhettiarachchi as Victor
- Surya Dayaruwan
- Randika Goonetileke
- Suranga Ranawaka as Menika
- Yohani Hettiarachchi as Venuki, Nita’s younger daughter
- Bandula Sooriyabandara as Mr. Saparamadu, Nita’s father
- Prasanna Dakumpitiya
- Sunil Premaratne as Lawyer Samaradiwakara
