Rio Olympics 2016: US gymnast Simone Biles is surprised in Rio by crush Zac Efron

Zac Efron makes an appearance on the Today show set on Copacabana Beach in Rio de Janeiro. Photo / Getty

Zac Efron has revealed he felt compelled to fly all the way to Rio to meet US gymnast Simone Biles as soon as he heard she was a fan of his.

Biles, a four-time gold medalist at the Rio Olympics and the most decorated American gymnast in history, said she has a crush on the actor and has a cardboard cutout of him in her bedroom.

Efron watched the American gymnastics team compete from the US, and then jumped on a plane to travel to Brazil to surprise them.

My Olympic dream came true 🙏😜 #Rio2016 #FinalFive pic.twitter.com/zcpPispCUS

— Zac Efron (@ZacEfron) August 17, 2016

He told the Today Show that finding out Biles, 19, and the team were fans of his "just blew my mind".

"What kind of a guy am I if I don't show up?" he said.

When Biles and Efron finally met, her gave her a kiss on the cheek, prompting the gymnast to proclaim on Twitter: "Just call me Mrs Efron already".