Kianna Underwood, a talented former child actress best known for her roles on Nickelodeon's popular sketch comedy series All That and the animated show Little Bill, has passed away at the age of 33.

Born on November 28, 1992, in New York City, New York, Underwood began her career in entertainment at a young age. She made her film debut in 1999 with a role in The 24-Hour Woman alongside Rosie Perez. From 1999 to 2004, she voiced the character Fuchsia Glover in 23 episodes of Little Bill. In 2005, she joined the cast of All That for seven episodes during its tenth and final season of that era, appearing alongside stars such as Amanda Bynes, Nick Cannon, and Kenan Thompson.

Beyond television, Underwood performed on stage, spending a year in the first national tour of the musical Hairspray as Little Inez. She also had additional credits, including voice work in the 2001 TV movie Santa, Baby! and a small role in Death of a Dynasty.

Underwood was tragically killed in a hit-and-run accident in the Brownsville neighborhood of Brooklyn, New York, on January 16, 2026, when she was struck by a vehicle while crossing the street. She was pronounced dead at the scene. Her family and fans mourn the loss of a promising talent whose early work brought joy to many young viewers. She will be remembered for her vibrant presence on screen and stage.