Filmi Family Tree: Know Karan Johar's famous cousin?

Think you know everything about Bollywood? Test your gyaan here!

Son of late film producer Yash Johar, Karan is known as Bollywood's most sociable star.

So it particularly strikes as odd that many of us didn't know that this filmmaker is related to one of the most important filmmakers of our time.

Click Next to see who that is!

Karan Johar's mother Hiroo is the youngest Chopra sibling -- she is sister to B R Chopra and Yash Chopra.

That makes Karan Johar and Aditya Chopra first cousins.

It's no wonder then that when Aditya decided to turn director with Dilwale Dulhaniya Le Jayenge, he enlisted Karan to assist him and even act in a bit role.