It's Charlotte Grayson's birthday this Sunday night on an all-new Revenge.

It may also be the young woman's last birthday as a Grayson, apparently.

With Emily hovering just a few steps behind (obviously), Charlotte walks into an intimate family celebration in her honor declaring that her first decision as a legal adult will be to drop her surname.

From this moment on, she will be known as Charlotte Clarke, in honor of her biological father. The awesome sound of silence that follows may actually be Victoria Grayson's brain exploding.

Check out the sneak peek from "Collusion" below ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.