I was surprised to just learn that the play (and screen adaptation) were written by an agnostic. This from Wikipedia:
The 20th-century agnostic playwright Robert Bolt portrayed More as the ultimate man of conscience in his play A Man for All Seasons, the title drawn from what Robert Whittington in 1520 wrote of him:
"More is a man of an angel's wit and singular learning. I know not his fellow. For where is the man of that gentleness, lowliness and affability? And, as time requireth, a man of marvelous mirth and pastimes, and sometime of as sad gravity. A man for all seasons."[23]
In 1966, the play was made into the successful film A Man for All Seasons directed by Fred Zinnemann, adapted for the screen by the playwright himself, and starring Paul Scofield in an Oscar-winning performance. The film won the Academy Award for Best Picture for that year.