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Sebastian Verlac

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SPOILER WARNING: Plot details for this character can be
found on the linked book pages. Caution is advised!
CJ 09 September Tessa
“It felt so real, so utterly real—”

This article depicts a subject within the Shadowhunters television series, and as such, it either does not play a role within or differs largely from the established continuity and canon of the books of The Shadowhunter Chronicles.

Sebastian Verlac
Portrayed by Will Tudor
Will as Sebastian, BTStemp

temporary image; from BTS

Biographical Information
Status: Alive



London Institute

Physical Description
Gender: Male

Sebastian Verlac is an English Shadowhunter from the London Institute.[1] He is a charming, brilliant, and highly-educated Shadowhunter with unrivaled fighting abilities who finds his way to the New York Institute after befriending someone from the city.[2]

Behind the scenes

  • This version of Sebastian will only appear on Freeform's Shadowhunters: The Mortal Instruments. He will be portrayed by recurring guest star Will Tudor.[1][2]
  • He will debut on the first episode back after the Season Two break (11th episode of the season). He will be first introduced in reference to a character already known on the show,[3] and will head to the Institute after befriending one of the main characters.[2]
  • Differences from the novel:[1]
    • Sebastian Verlac will be from London Institute, while his book counterpart was from Paris.
    • The character will have a British accent.
    • The writers put their own spin on the character.
  • Behind the scenes, the writers refer to him as "Bass".[4]
Spoilers under the cut!
  • Sebastian may also have a new backstory on the show.[5][6]
    • Sebastian's backstory may be that he grew up in Hell, where he was tortured by a demon. His skin was torn off layer by layer, among other terrible things done to him.
    • Sebastian's character has been described as "someone who can be compassionate, and who may seem like a decent person on the surface. (...) That kind of dramatic resonance never goes away from a person, no matter how you shellac it."[7]


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