Happy Ending got de Caestecker his second BAFTA Scotland nomination/ His biggest break yet came in 2013 when he landed the role of Leo Fitz on Agents of SHIELD on his first visit to Los Angeles.

Young James Herriot is a three-part British television drama based on the early life of veterinary surgeon James Herriot. It features Iain de Caestecker as the title character following his ...

Executive producer Lachlan MacKinnon had plenty of praise of his own for Iain De Caestecker and what the Agents of S.H.I.E.L.D. alum delivers as Arthur Pendragon.

That show in particular has one episode with a tough scene that fans praise to the skies, and that's due largely to actor Iain De Caestecker.