Mumbai: Dance rules Hrithik’s heart, his mind and even his sleep. The superb dancer’s effortless onscreen moves are the result relentless hours of rehearsals.

The actor, who is reprising Amitabh Bachchan's role in Karan Johar's ‘Agneepath’ remake, has been quietly rehearsing for a song in the movie after finishing the shoot.

Hrithik, who is also making his debut on small screen with reality show ‘Just Dance’, says he cannot perform a move without imagining it first.

“Along with rehearsals, I actually learn dancing in my sleep. If I can clearly see every moment of the move in my head, then my body is able to express it... The downside is that if I can't see it - I can’t do it,” Hrithik said.

Johar feels that Hrithik is “a relentless rehearsal man.”        “Exhausting hours result in effortless moves – that’s Hrithik for you. He raises the bar of excellence and validates the input equals output theory!”

The director-producer, who earlier directed Hrithik in ‘Kabhie Khushi Kabhi Gham’, recounts a previous experience.

“We had two hours to shoot at the British Museum. Hrithik was given an elaborate dance piece that could have thrown anyone off, even internationally, but he worked through the night and came straight to shoot. It took just one take and we were done and out of there!”