A CELEBRATION OF "LAST LECTURER" RANDY PAUSCH'S LIFE WITH DIANE SAWYER ON "GOOD MORNING AMERICA," MONDAY, JULY 28, AND ON "PRIMETIME," TUESDAY, JULY 29

Diane Sawyer will celebrate the life of Carnegie Mellon Professor Randy Pausch -- who today passed away from pancreatic cancer -- with a tribute on "Good Morning America," MONDAY, JULY 28, followed by a special "Primetime" entitled "The Last Lecture: A Celebration of Life," TUESDAY, JULY 29 (10:00-11:00 p.m., ET) on the ABC Television Network.

The 47-year-old professor became known for his "last lecture" which evolved into an internet phenomenon viewed by millions of people. Sawyer first met with Pausch in the fall of 2007, and several times thereafter to speak with him about the impact and lessons learned from his now famous college speech, his life following his diagnosis and his bestselling book, The Last Lecture. Her report will offer a unique look back at this remarkable man, as well as cover reactions from people whose lives he impacted.

Last August, doctors gave Pausch three to six months to live after learning his cancer had spread. A month later he delivered a heartfelt speech full of inspiring life lessons and wisdom to a packed audience of Carnegie Mellon students, colleagues and friends. The lecture he gave -- "Really Achieving Your Childhood Dreams" � continues to be an internet sensation that millions of people have found uplifting, moving and funny. He shared many of life's lessons with Sawyer over the year, telling stories about how he followed his own advice to "never lose the childlike wonder" and "never break a promise."

David Sloan is the executive producer of "Primetime."