Tightrope Walker Nik Wallenda.

Nik Wallenda has successfully completed his two skyscraper tightrope walks in Chicago in a spectacle televised to an audience of millions around the world.

The 35-year-old daredevil first walked a high wire on Sunday night at a 19-degree incline from the Marina City west tower to the top of a building on the other side of a river.

• 7.1-magnitude earthquake rocks Fiji
• Fans descend on LA for Hello Kitty Con
• Part of Amelia Earhart’s plane found: reports

He then walked blindfolded between the two Marina City towers without using a net or harness.

It took just over six minutes to walk the 138 metre stretch from the Marina City west tower to the top of a building on the other side. The tightrope began 180 metres from the ground and ended at 204 metres— a 19-degree incline.

Wallenda’s previous feats include high-wire walks over the brink of Niagara Falls and across the Little Colorado River Gorge.

We see you down there, Chicago! Let’s go… #SkyscraperLive pic.twitter.com/IHcYnHAv13

— Willie Geist (@WillieGeist) November 2, 2014

Wallenda is the great-grandson of Karl Wallenda, who fell to his death during a tightrope stunt in Puerto Rico at age 73.