Lyn Harding (12 October 1867 – 26 December 1952) (real name David Llewellyn Harding) was a Welsh actor who spent 40 years on the stage before entering British made silent films, talkies and radio. He had an imposing and menacing stage presence and came to be cast as the villain in many films, notably Professor Moriarty in dramatisations of the Sherlock Holmes stories.
He was born in 1867 at St Brides Wentloog, in Monmouthshire, into a strict Congregationalist Welsh-speaking family.
He started his career as an apprentice draper in Newport, Wales and but he was drawn to an acting career. He began giving readings from Shakespeare at a chapel in Cardiff. In 1890 a chance meeting with a touring group on a train led to him standing in for a sick actor and his first professional engagement. He opened on 28 August 1890 in The Grip Of Iron at the Theatre Royal, Bristol.
He toured "the provinces" and eventually made his London debut at the Shakespeare Theatre, Clapham on 19 July 1897.
He later changed his name to "Lyn" to make it more acceptable to English audiences who found "Llewellyn" difficult to pronounce.
His career spanned stage, silent screen, talkies and radio productions and he toured in the United States, Japan, India and Burma. He worked at different times with John Gielgud, Ralph Richardson and Anthony Quayle.
His last stage appearance was as Abu Hassan in Chu Chin Chow in the West End in 1941 when he was 74 years old. At the age of nearly 80 he played Owain Glyndŵr in Shakespeare's Henry IV for BBC radio.