The “Bridget Jones” franchise is long beloved by fans, due in extremely large part to Renée Zellweger’s portrayal of the title character. So, yes, the actress was a resource director Michael Morris turned to a lot while making the fourth film — and there was one particular insight from the Oscar winner that he says unlocked the whole thing.

Renée Zellweger set her mind to think pink on the red carpet premiere of “ Bridget Jones: Mad About the Boy ” on Sunday in Sydney. The Oscar-winning actress was joined by costars Chiwetel Ejiofor and Leo Woodall for the latest promotional tour stop for the film, based on the 2013 novel by Helen Fielding.