Stiller is to play the title character in "The Secret Life of Walter Mitty," which he is also directing, and will be seen next in "Neighborhood Watch." His film credits include "Tropic Thunder," "The Royal Tenenbaums," "Zoolander," "Meet the Parents," "There's Something about Mary," "Flirting with Disaster" and "Reality Bites."
Previously announced as Oscar presenters are Halle Berry, Rose Byrne, Bradley Cooper, Tom Cruise, Penelope Cruz, Cameron Diaz, Tom Hanks, Angelina Jolie, Milla Jovovich, Ellie Kemper, Jennifer Lopez, Melissa McCarthy, Wendy McLendon-Covey, Chris Rock, Maya Rudolph, Emma Stone and Kristen Wiig.
Academy Awards for outstanding film achievements of 2011 will be presented Feb. 26 at the Kodak Theatre at Hollywood & Highland Center. The ceremony will be televised live on ABC.