She first gained fame as a child actress on the television series Good Times (1978–1979), and rose to greater prominence for her role as Dorothy "Tootie" Ramsey in the NBC sitcom Diff'rent Strokes (1979–1981), as well as its spin-off The Facts of Life (1979–1988).

Fields made her transition into mature roles as Regine Hunter on the Fox sitcom Living Single (1993–1998).

When the show began production, Fields was so short that the producers put her on roller skates during the first season so that they could avoid difficult camera angles.

[5] After taking time away from acting to attend Pepperdine University, Fields appeared in a 1993 episode of The Fresh Prince of Bel-Air, in which Will Smith pretended to marry her in an attempt to seduce her.

[6] Fields had a starring role in the hit Fox sitcom Living Single as Regina "Reginé" Hunter from 1993 to 1998.

[8] Following the end of Living Single, Fields began performing R&B and rap music with a group called Impromp 2.

It marked the first time in six years (since The Facts of Life Reunion movie) that Fields and Whelchel had seen each other.Fields has worked with her husband Christopher Morgan on projects.

[15] On August 18, 2015, it was announced that she would be joining the cast of the Bravo reality television show The Real Housewives of Atlanta for its eighth season.

In July 2013, Fields announced on the talk show The Real that she and her husband were expecting another son;[22] on December 3, 2013, they welcomed Quincy Xavier Morgan in Atlanta, Georgia.