For Sachy see, Sachy (writer)
Sachy-Sethu, also referred to as Sachy and Sethu or Sachidanandan and Sethunath, are two Malayalam screenwriters known for their multiple collaborations. Their last work together was Doubles. In addition, Sachi has scripted two films alone: Run Babby Run and Chettayees. Chetayees was also co-produced by him under the banner of Thakkaali Films.
References
Sachi-Sethu Wikipedia(Text) CC BY-SA