Tennis superstar Serena Williams doubles as a fashion designer, spokeswoman, and part owner of the Miami Dolphins -- but now TMZ has learned she's adding RAPPER to her resumé.
We're told Serena hit the studio last week to lay down a few tracks ... and is working with a record label owned by Minnesota Vikings star Bryant McKinnie.
During the session, we're told Serena did some work with renowned hip-hip producer DJ Clue ... and she wasn't half-bad.
Is there anything she isn't good at?
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