West Indies captain Carlos Brathwaite will deputise as one of Kent's overseas players in the Vitality T20 Blast.
The 29-year-old - who leads the Windies in the hurricane relief match versus the Rest of the World at Lord's on May 31 - made his name hitting four successive sixes off Ben Stokes in the final over of the 2016 World Twenty20 final.
He will join the Spitfires squad before the opening group match against Surrey on July 6 and plays the first four matches before Australia's Marcus Stoinis arrives.
"I'm delighted to be joining Kent Spitfires for my first taste of county cricket," Brathwaite said.
"I have a good relationship with Sam Billings, having played in the same team at the Indian Premier League and Big Bash League.
"Sam chatted to me about the opportunity to join and has told me a lot about the great support and atmosphere on T20 nights.
"I hope I can entertain the supporters and am looking forward to joining up with the Spitfires squad."
Kent director of cricket Paul Downton added: "Carlos is a proven match winner. He is an explosive ball striker and a skilful white-ball bowler with good variations and extensive experience in the 20-over format.
"We are excited that Carlos will be with us for the start of our Vitality Blast campaign. I'm sure he'll make an impact in his brief spell with the Spitfires."
Meanwhile, Kent are in County Championship action this week when they travel to take on Glamorgan in Division Two.
Kent are 1/1 to win the match while the Welsh outfit are 10/11.
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