30 Rock star Tracy Morgan says he'll return to work tomorrow after being hospitalized last night in Park City, Utah.
Morgan collapsed during an awards ceremony Sunday during the Sundance Film Festival and his rep told ET the 43-year-old comedian was hospitalized for a "combination of exhaustion and altitude."
Read: Tracy Morgan Apologizes for Anti-Gay Slurs
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.
Read: Tracy Morgan Misses Work Due to a Kidney Transplant
A rep for Morgan -- a recovering alcoholic -- called rumors that the actor was intoxicated at the event "100 percent false" and said he had consumed no alcohol.