|“||The one girl here who actually appreciates how beautiful you are. You wouldn't stab me in the heart, would you, Matty Blue? No, I don't think so. You will definitely go down as the best night I never had. Oh, well.||”|
Katherine used Matt to activate Tyler's curse by a way of Matt's death; her plan failed, however, and Sarah died instead. Matt was very public with his dislike of Katherine, but protected her from Silas, along with Jeremy. After Katherine helped expel Gregor from Matt's body, the two have become allies with the possibility of becoming friends. However, after Katherine successfully possesses Elena's body, Matt goes against Katherine, once again. They share a goodbye scene in where Katherine compliments Matt before Katherine is stabbed to death by Stefan Salvatore's Traveler blade. This separates Katherine and Matt for good.
Throughout The Vampires Diaries Series
- Matt dated her doppelgänger descendant, Elena Gilbert.
- Katherine fooled Matt twice - in The Return and in The Devil Inside - by pretending to be Elena.
- Katherine has admitted that she thinks Matt is hot, often commenting on his blue eyes.
- Katherine and his sister Vicki are the only two characters to call him Matty.
- Katherine has a crush on Matt.
- Matt has slept with Katherine's daughter Nadia.
- Katherine often calls Matt "Matty Blue". She also calls him "Matty Blue Blue" and "Matty Pants".
- Katherine showed a romantic interest in both men Elena gave up on, while never truly having romantic feelings for Damon, who Elena chose. Ironically, the only one of them that actually pursued Katherine was Damon.
- Katherine: "Those blue eyes... they made me soft. I should've ripped your head off when I had the chance.
- - True Lies
- Katherine: "How about now? Matty Blue-Blue. I want another drink."
- Matt: "No! You're drunk and scaring the customers."
- Katherine: "You realize that every single time you say no, it just makes you hotter, right?"
- Katherine: "What are you watching, some Czech reality show?"
- Matt: "How'd you know it was Czech?"
- Katherine: "Eye contact. We're getting started."
- - Dead Man on Campus
- Katherine: (to Matt) "I'm paying you to make me hot again. Whip me into shape and prolong this death thing as long as possible."
- - Fifty Shades of Grayson
- Katherine: "Oh... The one girl here who actually appreciates how beautiful you are. You wouldn't stab me in the heart, would you, Matty Blue? No, I don't think so. You will definitely go down as the best night I never had. Oh, well."
- Matt: "Oh, well."
- - Gone Girl