Ashley Benson (Hanna Marin) and Shay Mitchell (Emily Fields) don't just play best friends on Pretty Little Liars — they're totally BFFs in real life, too.

Most recently, the gals headed out to "prom" night together along with some friends.

This weekend, Ashley tweeted, "Prom tonight with @thatrygood @taylorjacobsonn @shaymitch @aricwithana @CheetoSantino and @nickkreiss," and then followed up with this adorable photo of her and Shay.

Apparently this was Ashley's first prom experience. She tweeted, "Soo @thatrygood [Ryan Good] is taking me to my first prom tonight :p:

But both Shay and Ashley graduated from high school long ago, and mid-December isn’t even close to prom season, so we don't know what this “prom” really was. What we do know is that these Little Liars definitely looked like the belles of the ball. Love it!

Source: Twitter

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