Rahul Singh a.k.a "Master Rinku' started his career at the age of 3 years,his first film as an actor was shelved, but Director of that movie was impressed with his performance and wrote a letter of recommendation to Director "Prakash Mehra" and thus he was cast in the movie "Namak Halal", where he played young Shashi Kapoor.

As an child actor first amount he was paid rupees 90 per day, being from a poor family his father "Amarjeet Singh" made him realized the value of money and the importance of being actor,so he encouraged him in to acting to afford a proper education and better living, from that day Rahul singh never looked back.

Rahul singh has been fortune to worked with most of the Bollywood senior actors like Dilip kumar,Pran, Dharmendra,Jeetendra,Shammi Kapoor,Sanjeev Kumar,Rishi kapoor,but still he regret that he never got a chance to share a screen with his all time favorite actor "Amitabh Bachchan".

Rahul singh"s last film as a child artist was "Namak",

After some years Master Rinku aka "Rahul Singh" made a debut as Story Screenplay writer of movie "Kya Love Story Hain" starring Kareena Kapoor, Tushar Kapoor, Ayesha Takia, it was directed by his elder brother "Lovely Singh", besides writing he also acted in this movie.

In order to further strengthen his knowledge of movies,he finally got an opportunity to learn the ropes of direction under the guidance of Film Director Sanjay Leela Bhansali,

Now in 2017 he has directed a music album with actress Ayesha Takia titled 'zindagi yeh zindagi'