MORE PHOTOS: 20th Annual Los Angeles Times Festival of Books @ USC

PHOTO BY JASON RZUCIDLO / ©AMERICAJR.com Actor Jon Cryer takes the stage at about 12:10 p.m.

PHOTO BY JASON RZUCIDLO / ©AMERICAJR.com

A large crowd showed up for his book talk

PHOTO BY JASON RZUCIDLO / ©AMERICAJR.com

Of course, he had to talk about playing Alan on "Two and a Half Men."

PHOTO BY JASON RZUCIDLO / ©AMERICAJR.com

Cryer read the prologue from his book, "So That Happened."

PHOTO BY JASON RZUCIDLO / ©AMERICAJR.com

A close-up of the actor/comedian

PHOTO BY JASON RZUCIDLO / ©AMERICAJR.com

His book features a chapter on working with Charlie Sheen