A passenger on a Korean Air flight got violent on Tuesday, but lucky for the crew, pop singer Richard Marx was on board.

The '80s balladeer and his wife, TV host Daisy Fuentes, were onboard Korean Air Flight 480 from Hanoi to Seoul, when a guy started attacking the flight attendants and passengers, Fuentes said on Instagram.

The crew apparently struggled for four hours to subdue him. Marx was first to get out of his seat and help, she added, posting a picture of her husband holding a rope.

A photo posted by DAISY (@daisyfuentes) on Dec 20, 2016 at 3:07am PST

Korean Air 480 pic.twitter.com/tHaJ0oMxPq — Richard Marx (@richardmarx) December 20, 2016

Marx, too, posted the same string of pictures that Fuentes took to his Twitter account later.

Korean Air 480 pic.twitter.com/Ai9U6CV3qA — Richard Marx (@richardmarx) December 20, 2016

Korean Air 480 pic.twitter.com/Clh7fiDcXl — Richard Marx (@richardmarx) December 20, 2016

He added that the crew was "completely ill-equipped" and "ill-trained" for the situation.

You will be hearing about our flight#480 on @KoreanAir_KE . Passenger next to us attacked passengers and crew. Crew completely ill trained. — Richard Marx (@richardmarx) December 20, 2016

We have video of entire chaotic and dangerous event on @KoreanAir_KE 480. Lasted 4 hours. Crew completely ill-equipped to handle situation. — Richard Marx (@richardmarx) December 20, 2016

Fuentes said that the drama lasted so long, in part because the crew "never fully got control" of the unruly passenger.

"They didn't know how to use the taser and they didn't know how to secure the rope around him (he got loose from their rope restraints three times)," she said.

While Marx is receiving praise for stepping up, there's a whole segment of people who are surprised to hear that Marx and Fuentes got married.

Today, I learned Richard Marx restrained a guy on a plane. I also learned Richard Marx married Daisy Fuentes. How did I not know this? — Erik Raines (@927Erik) December 20, 2016

RICHARD MARX AND DAISY FUENTES ARE A COUPLE?? — JamesLJazz (@jamesljazz) December 20, 2016

I think the biggest news of the day is: Richard Marx & Daisy Fuentes are married? — Aim2Misbehave (@MondayAddams) December 20, 2016

main takeaway from this piece is not that Richard Marx is brolic but that Richard Marx is married to DAISY FUENTES A photo posted by joncaramanica (@joncaramanica) on Dec 20, 2016 at 3:40pm PST

Thankfully, both '80s/'90s icons are home safe now.

Marx tweeted to say he wasn't being a hero, "just did what I would hope anyone would do in the same situation."