An aggrieved Rishi, 65, took to Twitter where he posted a photo of the now dilapidated premises of the studio, which was founded in 1948 by celebrated actor-filmmaker Raj Kapoor in Chembur suburbs.
"2017 September 16. Gutted by a devastating inferno. Scars shall remain but will build a state of the art studio. (sic)," wrote Rishi.
The actor also shared some old photographs of the studio, reminiscing the golden days of the studio.
A level 2 fire had broken out on the sets of the show "Super Dancer", which spread from the electrical wing of the RK Studio and gutted the ground floor.