Conversation so far:
When was Hrithik Roshan born?
Hrithik Roshan was born on 10 January 1974
Who are Hrithik Roshan's parents?
Hrithik Roshan father, film director Rakesh Roshan, is the son of music director Roshanlal Nagrath; his mother, Pinky, is the daughter of producer and director J. Om Prakash.
Does Hrithik Roshan have siblings?
Hrithik Roshan has an older sister, Sunaina.
What is Hrithik Roshan's ethnicity?
Hrithik Roshan is of part Bengali ancestry from his paternal grandmother's side.
What is an interesting fact about Hrithik Roshan's early life other than his birth date, parents, siblings and ethnicity?
Hrithik Roshan was born with an extra thumb fused to the one on his right hand, which led some of his peers to avoid him.
Did Hrithik Roshan have the extra thumb problem fixed?
So once I thought of getting  surgically removed, Hrithik Roshan confides. But I didn't...“

Question: When did he begin acting?
Self-contained rewrite: When did Hrithik Roshan begin acting?