Nicol Williamson (14. septembar 1936 – 16. decembar 2011) je bio britanski kazališni, filmski i televizijski glumac. Poznat je uglavnom po karakternim ulogama, od kojih se ističe Merlin u znamenitom filmu Excalibur.

• Official website Arhivirano 2012-01-26 na Wayback Machine-u
• Nicol Williamson na sajtu IMDb
• Nicol Williamson na Internet Broadway Database (en)
• Nicol Williamson at Rotten Tomatoes
• Nicol Williamson Arhivirano 2012-02-24 na Wayback Machine-u at the Lortel Archives: The Internet Off-Broadway Database Arhivirano 2015-06-12 na Wayback Machine-u
• Obituary, The Independent, 26 January 2012
• Obituary, The Guardian, 26 January 2012
• Obituary, Financial Times, 27 January 2012