‘Arrow’ Star Katie Cassidy Flaunts Her Heroic, Thong-Loving Butt in Miami

Grant Gustin preps for the 2015 return of 'The Flash'.
Someone’s been keeping up with their squats!

Arrow star Katie Cassidy hit the beach in Miami Saturday wearing what can only be described as a very cheeky, thong bikini.

We’re going to go ahead and assume Katie’s been hitting the gym harder than ever with the impending debut of her antihero Black Canary on the CW hit. Up until now it’s been all business and pant suits for the actress, but that’ll change when Oliver Queen and company come back in the new year.

While you wait to see more of her in black leather, take a gander at the photo gallery above. It’s chock full of even more fun photos from Katie’s day on the beach.

And don’t forget to let us know what you think of her beach body in the comments below!