Of course you remember the scrawny looking guy with curly hair who played the head lamp hanging upside down; who light up the king's supper with a brilliant smile in the popular Happy-Dent ad. Well things have luckily turned around for this young chap since the time he starred in this ad. Sachin Nayak's latest venture is the ongoing film Siddhartha — The Prisoner where he plays a lead role with Rajat Kapoor.