Today is Grace Phipps' 24th birthday! You probably know the actress from her turn as Lela on Teen Beach Movie and April Young on The Vampire Diaries, but did you ever realize that she appeared on Austin & Ally in 2014?

There are a bunch of celebrities you probably didn't realize were guest stars on the show.

Click through the gallery to see celebrities who guest-starred. Let us know if you miss the show by tweeting us @j14magazine!