Alex von Tunzelmann (born 1977) is a British popular historian, author, newspaper columnist, podcaster and screenwriter.

From 2008 to 2016, Tunzelmann wrote a column for The Guardian entitled "Reel history", in which she discussed and rated popular films for their historical accuracy.

Churchillian biographer Andrew Roberts noted the irony that, "Ms. von Tunzelmann—who once had a column in The Guardian that attacked movies for their historical errors—has twisted the truth about Churchill".

[10] Matthew Norman in the Evening Standard acknowledged that despite the films "fancifulness", it was "an interesting and original study of a magnificent but unsaintly man raging in the dark against the dying of the light".

Tunzelmann was recognized by the Financial Times as Young Business Writer of the Year, and was shortlisted for the 2022 Wolfson History Prize[12] for Fallen Idols.