Yash Raj Films have released the first song Challa from the highly anticipated Shah Rukh Khan film Jab Tak Hai Jaan today. The video of the song features Shah Rukh Khan who is seen alone, strumming a guitar on a sufi song. Shah Rukh had been keeping his fans posted on the song release. He had tweeted: "Challa will be out on the 1st of Oct. Looking forward to it...havent seen it since we finished shooting it."

Today, he tweeted: "The Video of the First Song CHALLA from â??Jab Tak Hai Jaanâ? http://youtu.be/_q5duWVfDJo  ......lyrics meaning to follow.  He even explained the meaning of the lyrics of the sufi song sung by Rabbi Shergill. He posted: "As Rumi says the 2 insomnias of love where you keep searching for your lover. Thats the meaning of Challa ki labda phire.hope u all like it". Rabbi Shergill shot to fame in 2005 after his song Bulla Ki Jaana topped the charts. The music of the film is composed by AR Rahman, with lyrics by Gulzar. The film opens in cinema on November 13.

Watch the song Challa: