"Chaiyya Chaiyya" (English: [walk] in shade) is an Indian song from the 1998 Hindi film Dil Se.. directed by Mani Ratnam. The song was composed by A.R. Rahman, written by Gulzar, and sung by Sukhwinder Singh and Sapna Awasthi. It quickly became popular upon the release and its music video gained the same status, partly because it was filmed on a moving train. The Tamil version is called "Thaiyya Thaiyya", which was also popular among Tamils.

In 2002, the BBC World Service conducted an international poll to choose the ten most popular songs of all time. Around 7000 songs were selected from all over the world. According to the BBC, people from 155 countries voted "Chaiyya Chaiyya" ninth in the top 10 songs.

The lyrics of "Chaiyya Chaiyya" are based on the Sufi folk song "Thaiyya Thaiyya" with lyrics by poet Bulleh Shah. Singer Sukhwinder Singh originally suggested the song to A.R. Rahman who was looking for a Punjabi devotional song to include on the soundtrack of Dil Se... Gulzar subsequently rewrote the lyrics and changed the name to "Chaiyya Chaiyya".

"Chaiyya Chaiyya" reached the top of the charts in India and became popular in the United Kingdom.

The video was filmed on top of the Ooty train (the Nilgiri Mountain Railway) in mountainous Tamil Nadu, southern India while actor Shahrukh Khan dances with model/actress Malaika Arora and other dancers. The film was directed by Mani Ratnam and photographed by Santosh Sivan. The choreography was completed in four and half days by Farah Khan. No major back projections or post-production special effects were used in the music video.

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