Nicholas Ralph is a Scottish actor. He plays James Herriot in the Channel 5 and PBS Masterpiece television series All Creatures Great and Small, a remake of the long-running BBC series.

Personal life
Ralph was born in Cape Town and grew up in the Scottish Highlands. He had family in Georgia and Texas, and traveled to the U.S. a couple of times in childhood. As a young man, Ralph played association football, for Ross County from primary school until age 15, then for Nairn County under-19s.

The actor studied drama at Inverness College and then, at the Royal Conservatoire of Scotland. The audition for All Creatures Great and Small came two years after graduation. He had previous roles on stage which included plays with the Royal Conservatoire, the Citizens Theatre and National Theatre of Scotland. He also appeared on the BBC Radio Scotland production Kidnapped.

After graduating in 2017, he initially worked in live theatre with the Citizens Theatre for just under a year. His first lead role was with National Theatre of Scotland in a play called Interference. Before starting to film All Creatures Great and Small, Ralph did a tour with a Citizens Theatre/Wonder Fools production: 549: Scots of the Spanish Civil War.