Tracy Morgan has returned to work on 30 Rock following his collapse at the Sundance Film Festival this past weekend.
The star fell ill while promoting his new film Predisposed at the Park City, Utah event.
Morgan's rep later said his hospitalisation was caused by a combination of exhaustion and altitude sickness, while the actor himself jokingly tweeted that "Superman ran into a little kryptonite".
The star has since flown home to New York City and has begun filming 30 Rock once again.
Morgan's spokesperson told The AP: "He appreciates everyone's support and concern."
The comedian became embroiled in controversy in 2011 when he engaged in an anti-gay rant during a Nashville, TN stand-up show.
Morgan has since apologised for his comments and insisted that his first priority is always to "heal the world, not to hurt anyone".
