Popstar Richard Marx helps restrain passenger on Korean Air flight

Eighties pop heartthrob singer Richard Marx has hit the headlines after it was revealed he helped subdue a passenger on board a flight leaving from Hanoi, Vietnam, travelling to Seoul, South Korea.

According to Marx's wife Daisy Fuentes' Instagram, the two were sitting in their seats when a guy in the next row started attacking flight attendants and passengers.

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The singer was reportedly the first to help subdue the man when he started pushing the female staff and pulled their hair.

The incident went on for four hours and Fuentes noted the staff couldn't get control of the passenger because they couldn't use the taser and he loosened up the rope restraints three times.

Fuentes wrote in the picture caption: "I feel horrible for the abuse the staff had to endure but no one was prepared for this.

"They never fully got control of him. They didn't know how to use the taser & they didn't know how to secure the rope around him (he got loose from their rope restraints 3 times)."

Marx also took to social media posting various comments and photos to Twitter, documenting the 'entire chaotic and dangerous event.'

According to TMZ the passenger was arrested when the Korean Air flight landed.

Marx rose to popularity in the 1980s with a string of hits including 'Right Here Waiting' and 'Should've Known Better'.