F4 or JVKV is a Taiwanese boy band consisting of Jerry Yan, Vanness Wu, Ken Chu, and Vic Chou. The group was formed in 2001 after the Taiwanese drama Meteor Garden that they starred in was widely successful. Together they have starred in several Taiwanese drama series and released three albums, Meteor Rain (2001), Fantasy 4ever (2002), and Waiting for You (2007).

In 2007, due to copyright issues, the group changed its name to JVKV, using the initials of its members. Other than their home country, Taiwan, they have also attained popularity in other parts of Asia, such as China, Hong Kong, Singapore, Malaysia, Thailand, Indonesia, Japan, South Korea and The Philippines.

The group formed as a result of the success of a Taiwanese drama series, Meteor Garden. The series is an adaptation of the Japanese shōjo manga series, '(Hana Yori Dango). Yan plays the lead role of Dao Ming Si, an extremely arrogant and rich university student who meets his match in the poor but proud girl, Shan Cai. Chou, Wu and Chu play as his friends Hua Ze Lei, Mei Zuo, and Xi Men, respectively. In the series, the four guys identify themselves as a group called "Flower Four", or often shortened as F4.

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