Shay Mitchell Is a Bombshell in a Blue Dress in Pretty Little Liars #TBT Photo From 2010: See It Here!

Keegan Allen and Shay Mitchell in Pretty Little Liars.
Keegan Allen and Shay Mitchell hold hands on the steps of the Homecoming dance in this 2010 Pretty Little Liars episode. ABC FAMILY/ADAM ROSE

In honor of #TBT (aka the glorious tradition of Throwback Thursday), Us Weekly and Pretty Little Liars have partnered to bring you the prettiest little never-before-seen photos from season one on, straight from the ABC Family drama's archives. Scroll down for more on this week's picture, and check back every Thursday to see a new one!

Sing it with Us, Liars: Blue mooooon!

We're back with our latest #PLLTBT photo, and this time, we're revisiting a cherished—unless, of course, you're being stalked by a faceless fiend—high school tradition: Homecoming.

Flashback! In "There's No Place Like Homecoming" (season 1, episode 6, aired in 2010), Toby (Keegan Allen), rocking a haircut Justin Bieber would have been proud of, is still under suspicion by the girls—especially Spencer (Troian Bellisario). However, Emily (Shay Mitchell)—as much as a bombshell as ever in that cute ruffled dress—decides to ignore her friends' warnings and take the town creepster to the dance as her date. Ruh-roh!

As we all know, Toby has more or less become a trusted ally to the ladies since then—even becoming Spence's boyfriend. Then again, if you watched the ending of the last episode… No spoilers here!

Check back next week for another throwback pic—and tune in to Pretty Little Liars Tuesdays on ABC Family at 8 p.m. EST.

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