Nandanam marked Prithviraj's debut in 2002, under the direction of Ranjith. In the film, he portrayed the character Manu, who, while visiting his grandmother, falls in love with Balamani (Navya Nair), his grandmother's maid.
Prithviraj's portrayal of 'Style Raj' in the movie Vellithira has left an indelible mark on Malayalee audiences. With his unique style and captivating mannerisms, Raj charmed the viewers. The film revolves around the story of Thatha (Navya Nair), who falls in love with Style Raj, a movie projector operator who arrives in her village.
'Ayalum Njanum Thammil', directed by Lal Jose, stands as one of Prithviraj's most outstanding performances. In the film, he takes on the character of Dr Ravi Tharakan, initially a carefree college student whose perspective on medicine undergoes a profound transformation during his internship at Redemption Hospital in Munnar, under the guidance of the senior doctor, Samuel (Prathap Pothan).
This film is based on the real-life love story of Moideen and Kanchanamala, set in Mukkam during the 1960s. Prithviraj assumed the role of Moideen, while Parvathy portrayed Kanchanamala. The movie beautifully depicted their tragic love story, and Prithviraj's portrayal of Moideen was remarkably authentic and effortless.
Prithviraj's portrayal in 'Puthiya Mukham' undeniably propelled him to superstar status in Malayalam cinema. He takes on the character of Kichu, initially a shy individual who undergoes a dramatic transformation due to intense college ragging, resorting to assertive methods to deal with his tormentors.