Academy Award-winner Affleck, who is nominated this year for producing the Best Picture nominee Argo, won the award in 1997 for co-writing the Best Picture nominee Good Will Hunting.
Chastain, who is nominated for her lead performance in the Best Picture nominee Zero Dark Thirty, received her first nomination last year for her supporting role in the Best Picture nominee The Help.
Lawrence, who received her first nomination in 2010 for her leading role in Winter's Bone, is nominated for her lead performance in the Best Picture nominee Silver Linings Playbook.
Affleck, Chastain and Lawrence join a stellar list of previously announced Oscar presenters including Halle Berry, Sandra Bullock, Nicole Kidman and Reese Witherspoon, Mark Wahlberg, Ted, and Marvel's The Avengers cast members Robert Downey Jr., Samuel L. Jackson, Chris Evans, Jeremy Renner and Mark Ruffalo; returning 2011 Oscar winners Jean Dujardin, Christopher Plummer, Octavia Spencer and Meryl Streep; Chicago cast members Richard Gere, Queen Latifah, Renée Zellweger and Catherine Zeta-Jones; special guests Charlize Theron, Channing Tatum, Joseph Gordon-Levitt and Daniel Radcliffe; and performers Adele, Shirley Bassey, Norah Jones and Barbra Streisand.
Academy Awards for outstanding film achievements of 2012 will be presented on Oscar Sunday, February 24 at the Dolby Theatre at Hollywood & Highland Center, and will be hosted by Seth MacFarlane live on the ABC Television Network. The Oscar presentation also will be televised live in more than 225 countries worldwide. For more information go to Oscar.com or download the official Oscars app.
The Academy Awards episode 61.1, "The 85th Annual Academy Awards" stars Seth MacFarlane} and is directed by Don Mischer}.