Kumar belongs to a Jaat family which was based in a small village Kishan Garh of South Delhi. At the age of 24, he moved to Mumbai and worked with Sahej theatre group for five years, and later with Motley Productions where he met and learned from Naseeruddin Shah for the next ten years. Kumar was asked to audition for the film Mary Kom by the casting director of the film. Also, he worked in TV series Devon Ke Dev...Mahadev, playing Shukracharya the guru of the demon. Kumar's first movie was NH10, with Anushka Sharma but, it was Mary Kom, with Priyanka Chopra that was released first.

Filmography

• 2025The Bengal Files — Shiva Pandit
• 2024Kaagaz 2 — Uday
• 2022Dhokha: Round D Corner
• 2022The Kashmir Files — Krishna Pandit
• 2021Toofaan — Dharmesh Patil
• Aashram — Inspector Ujagar Singh
• Avrodh: The Siege Within — Major Raunaq Gautam
• 2019PM Narendra Modi — Corrupt News Reporter
• Parchhayee: Ghost Stories By Ruskin Bond — Leo
• The Family Man — Major Sameer
• 2018Baaghi 2 — Shekar
• 2017A Gentleman — Yakub
• 2017Mirza Juuliet
• 2016Sarbjit — Awais Sheikh
• 2015NH10 — Satbir
• 2014Mary Kom — Onler Kom
• Devon Ke Dev...Mahadev — Shukracharya
• 2003Tere Naam — Kanak

Appearances as themselves (1)

• The Kapil Sharma Show — Self