Claudette Wells (https://en.wikipedia.org/wiki/Claudette_Wells#:~:text=Louis%2C%20Missouri)%20is%20an%20American,)%20and%20Barnyard%20(2006).) was the original Whitley but Jasmine Guy (https://www.chicagotribune.com/news/ct-xpm-1988-11-03-8802120789-story.html) auditioned and she got the role instead:
https://www.lipstickalley.com/data/attachments/3308/3308255-75b588fba17847a4c44f7a9cc5125204.jpg

She ended up playing (https://www.imdb.com/title/tt0560133/) a grad student who was trying to seduce Dwayne for a bet.

https://www.lipstickalley.com/data/attachments/3308/3308997-a2fc9e7aa5ba912baae8a478ac8ab688.jpg

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In a recent interview on The Breakfast Club, Jasmine Guy mentioned that she was not the only person that was seriously being considered for casting for the role of Whitley Gilbert when the show first began production. And according to IMDB, this is the OTHER Whitley Gilbert.