Deol was born into a Punjabi Jatt family as the second son of Bollywood Superstar Dharmendra and Prakash Kaur. His elder brother is Actor Sunny Deol and also has two sisters Ajeeta and Vijayta. His step-mother is Bollywood dreamgirl Hema Malini, through whom he has two paternal half-sisters, actress Ahana Deol and Esha Deol. He is cousin to actor Abhay Deol.
Deol first appeared as a child actor in the film Dharam Veer in 1977 with a minor role. He made his adult bollywood debut with the film Barsaat in 1995. The film was a hit and also fetched him the Filmfare Best Debut Award. In initial part of his career he gave back to back hits with movies like Gupt and Soldier. Some of the other successful films of his career thus far are Badal, Ajnabee, Humraaz, Apne, Dostana and Yamla Pagla Deewana.
In his personal life He is married to Tanya Ahuja, and has two children.