Simone Biles and Final Five meet Zac Efron

— -- After making history Tuesday with her fourth gold medal in Rio, the most ever by a U.S. women's gymnast, it's hard to believe Simone Biles' day could've gotten any better.

It did.

Shortly after Biles won the floor exercise, finishing just ahead of teammate Aly Raisman, who took home the silver medal, the Final Five got a much-welcomed surprise when they arrived at NBC studios: Zac Efron. The actor, who is a widely known celebrity crush of Biles', was photographed on set with the Final Five, much to the shock and awe of Biles. Efron became a vocal supporter of Biles in Rio, and the two had recently gone back and forth on Twitter.?

Biles, 19, posted a video to Snapchat on Tuesday evening (make sure your volume is on):

Here are more photos from the surprise:

Sean Hurd is a digital media associate for ESPN. Follow him on Twitter @seanahurd