"You're the One That I Want" is a song written by John Farrar for the 1978 film version of the musical Grease. It was performed by John Travolta and Olivia Newton-John. It is one of the best-selling singles of all time, having sold over 6 million copies among the United States, the United Kingdom, and France alone, with estimates of more than 15 million copies sold overall.

Upon its release in conjunction with the film (and its status as a potential blockbuster worldwide), the single became a huge international hit, reaching number 1 in several countries.

In the U.S. the single reached #1 on the Billboard Hot 100 and on July 18 was certified Platinum for shipments exceeding 2 million copies. (It was already Gold by April 12.)

It also topped the UK Singles Chart for nine weeks in the summer of 1978, some months before the film had even been released in that country.

As of 2013, it is still the fifth best-selling single of all time in the U.K., where it has sold 2 million copies.

A re-released dance version of the single by Almighty Records reached #4 in the UK in 1998, the twentieth anniversary of the film's debut.

^*sales figures based on certification alone
^{^}shipments figures based on certification alone

In 1993, Epic Records released the London cast recording, Grease - Original London Cast Recording, and "You're the One That I Want" was issued as the lead single by Craig McLachlan and Deborah Gibson (Epic UK 659 522, released July 1993). it peaked at number thirteen in the UK.

British comedians Arthur Mullard and Hylda Baker also released a version of the song in 1978. Their version reached No. 22 in the UK.

In 1978, the German comedians Dieter Hallervorden and Helga Feddersen released a parody version under the title Du, die Wanne ist voll. The song reached position number four in the German charts.

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