Complex sentence: Coxon revealed to "Creative Screenwriting" that, when filming finally began with Hooper, he actually filmed an older version of the script: We had probably gone through twenty drafts before landing Tom Hooper.
Split into simpler sentences: Coxon revealed to Creative Screenwriting "that when filming finally began with Tom Hooper he actually filmed an older version of the script." We had probably gone through twenty drafts before landing Tom Hooper.