The 'Ghulam' star has also lauded singer Nayantara, who has lent her vocals for the song.
Aamir shared a video of the song on Twitter, and captioned it: "Nice song Anurag. And this new singer, Nayantara, is outstanding!"
Kashyap's 'Raman Raghav 2.0' narrates the story of the serial killer, who went on a murder spree in Mumbai in the 1960s. It features Nawazuddin Siddiqui as the notorious serial killer alongside Vicky Kaushal, who plays a police officer.
The psychological thriller, presented by Reliance Entertainment and a product of Phantom production, will hit theatres on June 24.