Kydd's first acting role was in the 1962 British comedy film The Iron Maiden, in which he appeared aged 6 with his father.
He also appeared in a 1989 AA commercial which ran for four years as the man who had his car buried in the sand,[1] and appeared in numerous radio and television series including Pipkins, Chambers, Dial M For Pizza, Flying the Flag, The Quest, Jonathan Creek, Trial and Retribution, The Castle, The Attractive Young Rabbi and Cabin Pressure.
His musical The Hard Boiled Egg and the Wasp, about the Victorian comedian Dan Leno, was on at the Lion and Unicorn Theatre in 2012.
Kydd has voiced over 12,000 adverts, promos, documentaries, corporate videos, and CD-ROM games, and has dubbed many films and TV programmes.
His Rudy Vees album The Fists of Harmonious Righteousness has three videos recorded from it: "King of Thongs", "My Baby's Possibly a Vampire" and "Dance Like My Dad".
He also provided voices for other games, such as Call of Duty, Fable, Demon's Souls, Crysis, Heavenly Sword, Bliztkrieg, Dragon Quest Swords, Hellgate: London, Dark Seer, Lego The Hobbit, Star Wars: The Old Republic, Assassin's Creed Syndicate, Assassin's Creed Unity, Age of Conan, Medieval II: Total War, Headhunter, and the 2001-2011 game adaptations of the Harry Potter films (as Rubeus Hagrid, Peeves, the Erklings, the Portraits, the Death Eaters, and others).
[4] Kydd has provided narration for a number of railway-related programmes produced by Video 125, as well as the ITV London fly-on-the-wall documentary The Tube.