The stars to shine for a great cause.

New moms Halle Berry and Jessica Alba and country crooner Carrie Underwood are the newest names to be added to the list of stars who will be standing up to cancer in a star-studded TV fundraiser.

The roster of stars who had already been scheduled to appear includes: Jennifer Aniston, Christina Applegate, Lance Armstrong, Josh Brolin, Kirsten Dunst, Elizabeth Edwards, Jon Favreau, America Ferrera, Neil Patrick Harris, Salma Hayek, Scarlett Johansson, Julia Louis-Dreyfus, Christina Ricci, Robin Roberts, Meryl Streep, Hilary Swank, Charlize Theron, Goran Visnjic, Forest Whitaker, Charles Barkley, Jack Black, Abigail Breslin, Kate Bosworth, Sheryl Crow, Ellen DeGeneres, Melissa Etheridge, Jimmy Fallon, Jennifer Garner, Brad Garrett, Angie Harmon, Tony Hawk, Marg Helgenberger, Diane Keaton, Rob Lowe, Mandy Moore, Keanu Reeves, Jimmy Smits and David Spade.

The celebs will appair in cancer PSAs during the hour-long special, which is set to air Sept. 5 at 8 p.m. on CBS, ABC and NBC.