On January 26, 2017, Will's casting for the part of Sebastian was announced, though he had been cast for the role for weeks and had already attended his first episode's table read before the announcement was made.
His audition was of a scene with Valentine from the episode Day of Atonement. Though he auditioned with an American accent, the Shadowhunters team decided to let him use his British accent for the role upon seeing him in Game of Thrones and Humans and, for this, changed his character's origin from Paris to London. The showrunners Todd and Darren sent his audition tape to Cassandra Clare, who immediately knew that Will would be cast for the role. She thought his audition was scary.
- Season 2 (9/20):
- Season 3 (so far 2/10):
- Will has history with Shadowhunters co-star Dominic Sherwood, who plays Jace, a character that Sebastian will be very intertwined to. The pair worked together at Hollister in London, met once again when both auditioned for the role of Olyvar on Game of Thrones, which Will got, and again worked together on Vampire Academy.
- ↑ 1.0 1.1 1.2 Shadowhunters Finds Its Sebastian in Thrones' Will Tudor | TVLine
- ↑ "I've been sworn to secrecy about Sebastian so..." Todd Slavkin on Twitter
- ↑ "Have you already found our Sebastian??" "As I said before, I am sworn to secrecy..." Todd Slavkin on Twitter
- ↑ "Yes he's been in a tv series. A very good one I might add #bass" Todd Slavkin on Twitter
- ↑ "211 table read" ... "But he was so good at the table read." Todd Slavkin on Twitter
- ↑ "It was from 216. "Would a 30 foot fall kill a man?" Todd Slavkin on Twitter
- ↑ ‘Shadowhunters’ Casts Will Tudor as Sebastian — TMI Source
- ↑ "His audition was very frightening?" Cassandra Clare on Twitter
- ↑ "His audition was quite scary." Cassandra Clare on Twitter
- ↑ Facebook Live with Will and Dom - Shadowhunters on Facebook