Leave it to Ashley Benson (Hanna) to look super hot, even during a lazy, makeup-free day by the pool.

The Pretty Little Liars actress took to Instagram, showing off a photo of herself lounging outside in a revealing blue bikini. Ashley looked natural in her selfie, rocking beach waves and a totally fresh face. Along with the pic, she wrote, "Last sunset."

It may be fall, but clearly that's not stopping this famous starlet from getting some Vitamin D in. As for what else we can look forward to during PLL Season 4, aside from Ashley's hot pics? The Halloween episode, of course!

The special episode will pick up right where we left off, showing the Little Liars looking for Ali (Sasha Pieterse) at a Ravenswood party. We're also going to be introduced to some new characters in the supernatural town, and according to Ian Harding (Ezra), "It's downright scary." Check out more spoilers about the episode, and then let us know how pumped you are in the comments below!

Source: Ashley Benson on Instagram

Catch the Pretty Little Liars Season 4 Halloween special on Tuesday, October 22, 2013 at 8 p.m. ET on ABC Family.