The 30 Rock star, who suffers from diabetes, underwent surgery in December (10) and he made his first public appearance since the operation at the Screen Actors Guild Awards in Los Angeles on Sunday (30Jan11).
Morgan reveals he recovered very quickly and was well enough to attend a New York Knicks basketball game just days after the operation.
He tells Access Hollywood, "I'm feeling great. I'm feeling brand new. Brand new... I was ready to go to work four days later. Four days later, I mean (I) was at the (Knicks) game and it was great, I feel great."
Morgan also admits the successful surgery has made him even more determined to help raise awareness for others suffering similar health problems.
He adds, "I'm a champion in that cause, and whatever the kidney people need from me they have, 'cause I experienced it, and I champion that cause."