Biles first confessed her crush on the "High School Musical" heartthrob during a March appearance on "The Ellen DeGeneres Show."
"Is it just 'cause he's gorgeous, is that why you like him?" DeGeneres asked. The 19-year-old responded with a confident, "Yes!"
The comedian later gave Biles a leotard with pictures of Efron's face. DeGeneres joked the leotard might help Biles get the actors attention if he didn't know who she was.
He definitely knows now. Efron congratulated Biles on Twitter for her performance during the gymnastics team qualifiers.
"So phenomenal a skill's named after her. Congrats on sticking the Biles and qualifying for the finals @Simone_Biles!" the 28-year-old tweeted.
"Thanks Zac! I hope you can watch Team Final tomorrow night," Biles responded.
During an interview with NBC's Stephanie Gosk, Biles admitted she even has her own life-size cutout of Efron in her bedroom.
"Sometimes I used to kiss him on the cheek," Simone told Gosk, admitting her obsession "is a little strange."
U.S. & World
Stories that affect your life across the U.S. and around the world.
But it appears Efron has admiration for Biles too. Following the gymnast’s gold medal performance in the team all-around competition Efron tweeted his support.
"Of course I'm watching the #FinalFive dominate the floor!" Efron wrote.
In the snapshot, Efron posed in front of Biles, Gabby Douglas, Aly Raisman, Laurie Hernandez and Madison Kocian with his hands in a heart shape.
Biles later retweeted the tweet.