Renee Zellweger supports Team Nanci at ALS Walk in Los Angeles

DOWNTOWN LOS ANGELES (KABC) -- Thousands of people hit the pavement in downtown Los Angeles on Sunday for the annual Walk to Defeat ALS.

Oscar-winning actress Renee Zellweger was on-hand as part of Team Nanci, in honor of Nanci Ryder. The Hollywood publicist was recently diagnosed with ALS.

Hear more about how Zellweger is showing support for the fight against ALS in the video above.