Arunoday Singh is the grandson of controversial Indian politician Arjun Singh.
After finishing his studies he started giving auditions, and finally made his debut with Sikandar (2009), directed by Piyush Jha, playing a Kashmiri terrorist.His second film was Anil Kapoor's home production Aisha (2010), an adaptation of the novel, Emma by Jane Austen, with Sonam Kapoor.
Also in the same year, he appeared in 'Vinay Shukla's take on Gender and sexuality in Mirch through a collage of five stories, with Raima Sen and Konkana Sharma, where he played the central character of a struggling film director.
In 2011, he acted along side Irrfan Khan and Aditi Rao Hydari, another newcomer in Sudhir Mishra's Yeh Saali Zindagi (2011). His performance earned him a nomination for Best Actor in a Supporting Role at the 18th Screen Awards.