Felix Baumgartner has reached 23 miles above Earth and the decision has been made to jump.
The skydiver is undergoing final checks.
Felix Baumgartner has passed the altitude mark which makes his journey the highest ever manned balloon flight.
Commentators on the live feed of Felix Baumgartner's world record skydive attempt said the daredevil's team are "continuing to troubleshoot the issue with the heat on the faceplate visor."
Red Bull Stratos team officials have reported a "minor issue" with Felix Baumgartner's faceplate.
There appears to be an issue with heating.
The issue is being "troubleshooted," the team said.
Over three million people are currently watching the live footage of Baumgartner's attempt.
Extreme athlete Felix Baumgartner has begun his ascent to 23 miles above Earth in his bid for a supersonic skydive.
Click 'play' to watch the world record attempt live.
Daredevil Felix Baumgartner said there is "no way" of turning back now after his record attempt was delayed today due to bad weather.
"It's all about what we do now and accomplish now. We've made it so far, there's no way turning back." Felix Baumgartner