Sivakarthikeyan Doss (born 17 February 1985), mononymously known as Sivakarthikeyan, is an Indian film actor, television presenter, playback singer and stand-up comedian, currently working in the Tamil film industry. He began his media career when he joined as a participant on STAR Vijay's Kalakka Povathu Yaaru, a comedy reality show, following which he was appointed as a regular presenter at the same television station. He has hosted a number of shows on STAR Vijay, including the third and fifth seasons of Jodi Number One, Adhu Idhu Edhu, Boys vs. Girls and Airtel Super Singer Junior while also conducting special film-promotional interviews. He made his debut as a film actor in Marina (2012) and has continued acting in lead roles in Manam Kothi Paravai (2012), Kedi Billa Killadi Ranga (2013), Ethir Neechal (2013) and Varuthapadatha Valibar Sangam (2013).
Sivakarthikeyan's father G. Doss was a Police Officer (Jail Superintendent). His grandfather is a Padmashree award winner for Nadaswaram. His native place is Thiruveezhimizhalai near Thiruvarur. He has done his schooling in Campion Anglo-Indian Higher Secondary School, Tiruchirappalli. He has completed his Bachelor of Computer Science Engineering at J. J. College of Engineering and Technology, Tiruchirappalli and MBA from Indian Institute of Planning and Management, Chennai. His sister is a doctor in Tiruchirappalli and he lives with his mother Raji and wife Aarthi,to whom he got engaged on May 16, 2010, and was married on August 27, 2010. His wife gave birth to a girl on the 22nd of October 2013 named Aaradhana.
Sivakarthikeyan won the Kalakka Povathu Yaaru competition on STAR Vijay and participated successfully in three dance-reality shows. He paired up, with Aishwarya in Vijay Jodi Number One Season 3 and went to the finals. He also took part in Boys Vs Girls Season 1 (winning the Best Entertainer Award) and Season 2 (with his team winning the Competition). He then got opportunities to host several shows on the same television station including Airtel Super Singer 3, Jodi Season 5, Jodi Number 1 Junior and the 5th and 6th editions of Vijay Awards.