updated 04/13/2014 AT 10:10 PM ET
•originally published 04/13/2014 AT 10:15 PM ET
The Neighbors star, 26, had Tweeted, “If I beat Thor [Chris Hemsworth] – I’m accepting the award shirtless on stage” back in March, but when the moment finally came Sunday night, Efron’s button-down remained firmly in place.
As the audience heckled him, Ora snuck up behind Efron and did the honors, ripping his shirt down to the navel to reveal that the actor had in fact been working on his fitness.
“I really don’t know what to say, but thank you so much to my fans,” a bare-chested Efron added before laughing and removing the top completely, whipping it around like a lasso. Rounding out his acceptance speech? A flex and salute to the cheering crowd.
If I beat Thor- I’m accepting the award shirtless on stage. #movieawards
Zac Efron (@ZacEfron) March 8, 2014
@RitaOra Thanks for such a bold move. I don't know if I could've done that on my own.
— Zac Efron (@ZacEfron) April 14, 2014