Underwood -- who began acting at the age of 7 -- got her big break in 2005 when she joined the cast of Nickelodeon's "All That" in its 10th season.

Kianna Underwood, an actress best known for her performance in Nickelodeon’s All That, has died. She was 33 years old. She had also voiced one of the characters from Little Bill. On January 16, 2026, ...