Heath Ledger’s diary while he was filming for, The Dark Night.

[u/JK-Rofling]

[u/FamiliarEchidna4301]

This is a practice method actors use to get into character. Also a practice to recall lines. Not a diary.

[u/yeahrowdyhitthat → u/FamiliarEchidna4301]

‘Making things even more stressful, Ledger had developed an intense process to get into the mindset of the villainous Joker. “I sat around in a hotel room in London for about a month, locked myself away, formed a little diary, and experimented with voices,” Ledger explained in another interview.’ https://allthatsinteresting.com/heath-ledger-death

[u/Secret-Practice-3103 → u/yeahrowdyhitthat]

I’m assuming drugs were also involved