Beginning in the mid-2000s, she had ongoing roles on several TV series, including acclaimed work as the voice of Huey and Riley Freeman for the animated series The Boondocks and Detective Lydia Adams on the TNT police drama Southland.
She also appeared in roles on 24, The Big Bang Theory, and Shameless. She was a cast member on ABC's John Ridley-penned ensemble drama American Crime, and played a devout member of the Nation of Islam and sister to a drug addict accused of murder.
Later in 1996 she gained fame starring in the blockbuster romantic comedy film Jerry Maguire as Marcee Tidwell, the wife of Cuba Gooding, Jr.'s character.
She played Will Smith's character's wife in Enemy of the State, and was also featured in How Stella Got Her Groove Back, Mighty Joe Young, Down to Earth, Daddy Day Care, Legally Blonde 2: Red, White & Blonde, A Cinderella Story, Ray and Miss Congeniality 2: Armed and Fabulous.
"I've been so busy with work and my girlfriends are like, 'Do you think a man is just gonna go knock on the door, like, 'I'm here! ' And I think I wish he would, but I have to make that more of a priority.""I don't understand," Williams replied. "Can he be the plumber or does he have to own the plumbing company?
"You're still in the juicy years.""I know and that's what one of my friends that's just a couple of years older than me [said], she was like, 'You'd better not waste these years! ""Own the plumbing company, own the plumbing company," the actress replied. I think you can find love anywhere and my heart is open to it, but I would like to have..I can pay for us to go on a vacation, all expenses paid out of King shares a 19-year-old son with Ian Alexander Sr.
She became known for her role as Brenda Jenkins on the NBC sitcom 227 (1985–90), a supporting role in the feature film Jerry Maguire, and for her roles in the television shows The Boondocks and Southland.