Wilhelmina Vivian Slater ( born Wanda Slater ) is a fictional character in the American dramedy series Ugly Betty . She is played by Vanessa Williams , who received a supporting actress award at the 2007 and 2008 NAACP Image Awards , a Best TV Villain award at the 2007 Teen Choice Awards and a supporting actress nomination at the 59th , 60th , and 61st Primetime Emmy Awards for her portrayal of the character .
Wilhelmina Slater is portrayed in a comedy-drama television series.