Melissa Hastings is a recurring antagonist on Pretty Little Liars. She is the sister of Spencer Hastings and a blackmailed member of the "A-Team". She attempted to kill Aria on the Halloween Train, dressed as the Queen of Hearts, and may have killed Garrett. She is also responsible for the death of Bethany Young, whom she believed was Alison.
She is portrayed by Torrey DeVitto, who also portrayed Nanny Carrie.
- Attempting to kill Aria Montgomery by pushing her off the Halloween Train.
- Killing Bethany Young by burying her alive, believing Bethany to be Alison and believing that Spencer had murdered her.
- Joining Mona's Army to take down Alison.
- Wearing the Black Swan costume, though blackmailed.
- Having a rivalry with Spencer, often causing her to come across as downright mean to both Spencer and her friends.