Prithviraj Sukumaran (born 16 October 1982), credited mononymously as Prithviraj, is an Indian actor, playback singer and producer best known for his work in Malayalam films. He has also acted in a number of Tamil, Telugu and Hindi films.

Prithviraj Sukumaran was born in Thiruvananthapuram to actors Sukumaran and Mallika Sukumaran. His initial schooling was at Shrine Vailankanni Senior Secondary School, T. Nagar, Chennai and St.Joseph's Boys' Hr.Sec.School, Coonoor, since the family was settled at Tamil Nadu that time. Later when the family shifted to Kerala he had his education from The NSS Public School Perunthanni, St.Mary's Residential Central School, Poojappura (which was near his home at Chengallur) where he acted in various plays and skits for the school's Annual Day Celebrations. He completed the rest of his school education at Sainik School Kazhakoottam and Bharathiya Vidya Bhavan, Thiruvananthapuram. Prithviraj, along with his brother Indrajith Sukumaran. He also participated in debates and elocution competitions while in school. Prithviraj won the title of "Mr LA Fest" in the Annual Inter-School arts festival hosted by Loyola School, Thiruvananthapuram in successive years and is the only person to date to win that title twice.

While pursuing his bachelor's degree in Information Technology at the University of Tasmania, Australia, he was called for a shot in the movies by film director Ranjith Balakrishnan to play the lead role in his film Nandanam. It was Fazil, a well known Malayalam film director, who introduced him to Ranjith. After his performance in Nandanam, he decided to take a break from studies to concentrate on his film career.

Prithviraj Sukumaran's elder brother Indrajith Sukumaran and sister-in-law Poornima Indrajith are also film actors.