Siddhartha Sankar "Sidhu" Ray is an Indian singer, lyricist, composer, playback writer, and actor from Kolkata, West Bengal.

Prior to pursuing his career in music, Ray left his dream profession of being a doctor at and formed the band Cactus, of which he is the frontman.

In 2003, he and his band made their debut in Tollywood (Bengali cinema), composing songs for Nil Nirjane.

Halud pakhi, on the other hand, created a long-lasting sensation in the contemporary Bengali music scene with its nostalgic feel being perfectly accompanied by Shudhu Tumi Ele Na and Amra Bhishon Eka complementing the overall mood of the album.

Apart from band music, ray has many singles under his name, among them songs like "Keno emon hoy", onno corridor from album "Letters from Siliguri", Mayabini, and Buro Radio are very famous.

[6][7] Line up: Sidhartha Sankar "Sidhu" Ray [vocals], Sibaji "Baji" Paul [drums], Sanjay Bhattacharya [guitar], Kanishka (Pinky) Sarkar [keyboard], Sandip Roy [bass], Abhijit Barman (Pota)[vocal] The band released its third album, Tuccho, in 2008.

Line up: Sidhartha Sankar "Sidhu" Ray [vocals], Sibaji "Baji" Paul [drums], Ritaprabha "Ratul" Ray [guitar], Sudipto Banerjee [keyboard], Sandip Roy [bass], Dibyendu Mukherjee [vocal] In 2017, Abhijit Barman (Pota) left the band due to several opinionated arguments By then, the band had already started working on their next album Tobuo Thik Acche.