Ang Lee recalls stylistic friction between Jake Gyllenhaal and Heath Ledger proving useful for Brokeback Mountain
Ang Lee described Heath Ledger and Jake Gyllenhaal's occasional disagreements during filming as "not quarrelling, but a clash of styles"

Take it from acclaimed director Ang Lee: sometimes a little bit of co-worker tension can turn into something beautiful. In a new piece for Empire’s Greatest Actors issue, the director pays tribute to the late Heath Ledger and muses on their experience working together on Brokeback Mountain in 2006. The acclaimed film won Lee an Academy Award for Best Director and saw both Ledger and Jake Gyllenhaal nominated for acting awards as well.
In the film, Ledger and Gyllenhaal star as two cowboys who struggle to come to terms with their sexuality (and feelings for each other) across a decades-long relationship. According to Lee, watching the pair of actors build a relationship on and offscreen was something he cherished. “I saw it unfold right in front of my eyes,” Lee recalls, “from rehearsal all the way to filming.”
However, Lee also says Ledger and Gyllenhaal had “a very different attitude towards their work,” which occasionally caused some discourse behind the scenes.