The actor, who only recently graduated from drama school, has been cast in the Christmas Special – playing a younger version of Sir Michael Gambon’s character Kazran.
Horn told the Ilkley Gazette:
“I finished the Central School of Speech and Drama on the Friday, had the audition on the Monday and by Thursday I was filming in Cardiff.”
He added that after his ‘exciting’ audition, his role took little more than a month to complete.
On set, Horn spent most of his time with fellow first-timer, Welsh mezzo-soprano, guest star and Kasterborous favourite Katherine Jenkins:
“We were together for a lot of the episode. Let’s just say I might be a bit of a hero with the boys.”
Horn also heaped praise on his co-stars Sir Michael Gambon and the Doctor himself Matt Smith:
“Working with Michael was fantastic as he’s one of my heroes, and Matt is brilliant to work with.”[He's] absolutely fantastic.”
The currently untitled special (rumoured to be called ‘Father Who?’) will air this Christmas on BBC One.
(via Digital Spy)