There is nothing bad in chasing your dream, but I think there is a way of explaining your dreams to your parents, especially parents who want their children to become one they wanted. A typical parent in India wants their children to excel in education; they want their children to do some very good courses and then to take a job. This means that every parent wants to see their children financially sound.
But people have dreams; some of them want to pursue things like Fine Arts, Acting, Music, or Games, which cannot assure immediate career success, as there is a lot of struggle involved in these areas.
If you are a parent, you wouldn't like your child to struggle in these areas. This may be a misconception, but yes, it is certain that one needs to have a conversation with the parents while explaining.
There are people with different strengths and emotional levels; some are very attached to the family find it very difficult to act on their own. Some are strong and strongly attached to their dreams may find their own way.
And Lastly...
Dream is not a one-day thing that I am talking about here. I am talking about that Dream which is the ONE, SINGLE, HAS MEANING TO YOUR LIFE, YOU HAVE BEEN THINKING ABOUT IT FOR YEARS AND YEARS, YOU HAVE TOTAL FAITH IN YOUR DREAM.
YOUR DREAM HAS A GREAT EXTENT OF ETHICS IN IT. (Ask Yourself, don't see anybody's opinion, but be ready with the answers that carry weight.) YOU ARE INTENTIONALLY OR DIRECTLY NOT HURTING ANYBODY. (Ask Yourself, Please try to measure your emotions with others, but if you are right, then there is no reason to stop, even if someone cries for nothing.)
If you think that you have to pursue your dream because it is a part of your life and you cannot live your life without it, then there is no other option. Go for it. Explain and fight every person that comes between you and your dream.
Please note that no one has ever reached their dream without obstacles.