Casting the role of Patrick proved difficult until Ledger came along.
“He needed to be masculine without trying to be masculine.
Thankfully for him, Ledger proved to be all of those things.
like cast him immediately.”
As Joseph Gordon-Levitt shared, “…we had such a good time.
All of us hung out, all the time” (viaInsider).
He just went full out and I got to watch it."
Ledger even had specific ideas about what his character should wear for the scene (viaInsider).