Oscar organizers announced Monday that "Hannah Montana" star Cyrus, "High School Musical" co-star Efron and Stewart and Lautner will be presenters at the awards show March 7.
They are four of Hollywood's biggest rising stars, bringing some youth appeal to the Oscars, whose overseers are trying to boost the show's TV ratings.
The Academy of Motion Picture Arts and Sciences previously announced that Sean Penn, Kate Winslet and Penelope Cruz, who won acting Oscars a year ago, will present honors this time around.
