"It feels especially amazing to be part of a film that represents all genders – two genders – all races and all ages in a positive way," Ridley said as she accepted the award.
The weekend was extra special for Ridley, who turned 24 on Sunday.
"Bringing in my 24th year with JJ @mtv Movie Awards!" Ridley captioned an Instagram photo of herself alongside director J.J. Abrams. "Thank you so much to everyone that voted for Breakthrough and Movie #starwars #theforceawakens."
She posed a smiling photo of herself holding her Golden Popcorn figurine.
She captioned the photo, "Wooooop!!! ... I love you guys thank you!!!"
The MTV Movie Awards aired Sunday at 8 p.m. E.T. on MTV