Nikhil Siddhartha (born June 1, 1985, in Hyderabad, India) is a popular Indian actor and producer who works predominantly in Telugu cinema.

He began his career with small supporting roles in films like Sambaram (2003) and Hyderabad Nawabs (2006), but his breakthrough came with Happy Days (2007), directed by Sekhar Kammula, which became a critical and commercial success. Nikhil quickly established himself as a versatile performer, taking on diverse roles in films such as Yuvatha (2008), Aalasyam Amrutam (2010), and Swamy Ra Ra (2013), which marked his rise as a bankable star. His performance in Karthikeya (2014), a mystery thriller, earned him widespread acclaim and solidified his reputation as an actor willing to experiment with unique scripts. He later starred in Ekkadiki Pothavu Chinnavada (2016) and Karthikeya 2 (2022), both of which were major hits and expanded his popularity beyond Telugu audiences.

Nikhil studied engineering at Muffakham Jah College of Engineering and Technology in Hyderabad before pursuing acting full-time. Known for his grounded personality, he married Dr. Pallavi Varma in 2020, and the couple has one child. Over the years, Nikhil has become recognized not only for his acting talent but also for his ability to choose innovative stories that resonate with younger audiences. His journey from supporting roles to leading man reflects his persistence, adaptability, and passion for cinema, making him one of the most admired contemporary actors in the Telugu film industry.