The latest move anyone has castled (GM play)

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Avatar of Mr_Handyman

I was just looking at Petrosian-Lutikov 1959 where White castled on move 28. It led me to wonder what's the latest anyone has castled in high-level play?

Avatar of Lagomorph

This game was only move 31, but black couldnt have left castling any later !

http://www.chessgames.com/perl/chessgame?gid=1037399,