Iain De Caestecker portrays Leo Fitz in Agents of S.H.I.E.L.D. and in the Agents of S.H.I.E.L.D.: Slingshot episode Progress. He also portrayed Fitz's Life-Model Decoy in The Man Behind the Shield and Self Control.

He portrayed himself in Agents of S.H.I.E.L.D.: Academy.


  • He was named TVLine's "Performer of the Week" for his acting in the episode Laws of Nature.


  • Leo Fitz's obsession with monkeys was inspired by Iain De Caestecker's own love for monkeys.
  • Iain De Caestecker voiced an alternate version of Leo Fitz in Ultimate Spider-Man.

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