U.N. Secretary General Ban Ki-moon let his hair down on Tuesday when he crossed wrists and joined South Korean rap sensation Psy in his trademark ‘Gangnam-style’ dance number.

Speaking to reporters at the U.N. headquarters in New York, Ban said he thought Psy, real name Park Jae-Sang, was so cool that he hopes he could manage global warming, CNN reported.

The U.N. Chief, however, did have one small concern: "I'm a bit jealous. Until two days ago someone told me I am the most famous Korean in the world. Now I have to relinquish," the Daily News quoted Ban as saying.

The compliment left Psy speechless at first, but the rapper later returned the praise by pointing out Ban’s growing popularity in South Korea. "He is the guy, you know, in everyone's heart in Korea, the best among the best," Psy said, the Daily News adds .

Take a look at Ban's moves in the slideshow below.

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  • In this Oct. 23, 2012 photo provided by the United Nations, UN Secretary-General Ban Ki-moon, left, is taught how to dance Gangnam Style by Korean rapper PSY during a photo opportunity at the UN headquarters in New York. (AP Photo/United Nations, Eskinder Debebe)

  • In this Oct. 23, 2012 photo provided by the United Nations, UN Secretary-General Ban Ki-moon, left, and Korean rapper PSY meet during a photo opportunity at the UN headquarters in New York. (AP Photo/United Nations, Eskinder Debebe)

  • In this Oct. 23, 2012 photo provided by the United Nations, UN Secretary-General Ban Ki-moon, left, and Korean rapper PSYshare a laugh during a photo opportunity at the UN headquarters in New York. (AP Photo/United Nations, Eskinder Debebe)

  • PSY

    In this Oct. 14, 2012 file photo, South Korean rapper PSY leaves the finish tower after he waved the checkered flag at the conclusion of the Korean Formula One Grand Prix at the Korean International Circuit in Yeongam, South Korea. (AP Photo/Mark Baker, File)

  • South Korean singer Psy (R), whose real name is Park Jae-sang, shakes hands with United Nations Secretary General Ban Ki-Moon (L) just before therr meeting October 23, 2012 at UN headquarters in New York. (STAN HONDA/AFP/Getty Images)

  • South Korean singer Psy (R), whose real name is Park Jae-sang, laughs with United Nations Secretary General Ban Ki-Moon (L) just before therr meeting October 23, 2012 at UN headquarters in New York. (STAN HONDA/AFP/Getty Images)

  • South Korean singer Psy (R), whose real name Park Jae-sang, does a dance-step with United Nations Secretary General Ban Ki-Moon (L) just before thier meeting October 23, 2012 at UN headquarters in New York. (STAN HONDA/AFP/Getty Images)

  • South Korean singer Psy (R), whose real name Park Jae-sang, does a dance-step with United Nations Secretary General Ban Ki-Moon (L) just before their meeting October 23, 2012 at UN headquarters in New York.(STAN HONDA/AFP/Getty Images)