Swift is a well-known fan of Lamar's, having lip-synced to his tracks and expressed her excitement when he surprise dropped his album earlier this year.
Meet Welvin Da Great.
@kendricklamar
#BadBloodMusicVideo pic.twitter.com/iz6iG87NLE
— Taylor Swift (@taylorswift13) May 11, 2015
The 'Shake It Off' star shared the latest poster for the upcoming music video, revealing Lamar will transform into Welvin Da Great for the new visuals.
The rapper joins an expanding crew including Ellie Goulding, Hayley Williams, Lena Dunham and more.
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'Bad Blood' is the fourth single to be lifted from Swift's recent album 1989.
The music video was directed by Joseph Kahn and will debut at the 2015 Billboard Music Awards on Sunday, May 17.
Swift has said that each person involved in the video chose their own persona and character name.
Watch the music video for Kendrick Lamar's 'King Kunta' below:
