On Monday the star tweeted: "Superman ran into a little kryptonite. The high altitude in Utah shook up this kid from Brooklyn." He added: "Thank U 2 the hospital staff. Back at work 2morrow shooting 30 Rock. Holla at me!"
Although Morgan appeared in good spirits while he and fiancé Megan Wollover posed for photographs at the Creative Coalition Spotlight Awards Sunday evening, he declined interviews with ET and fellow press, citing illness.