We had to do a

Finding Dory wasn’t without its pressures.

The stunning film, which premiered at the Edinburgh International Film Festival, follows the original’s sidekick Dory, voiced by Ellen DeGeneres, as she tries to overcome her chronic shortterm memory loss and find her own family.

Andrew said part of the reason he went back was to address a missing piece of the first film.

He said: “I hadn’t watched the film in seven or eight years and it wasn’t until 2011 when I was watching it to approve the 3D version, and I had some objectivity that I never had before.

“I saw it as an audience member instead of a filmmaker and I realised Dory was completely unfinished.

“She could lose Marlin and Nemo, she didn’t know who her family was, she kept apologising for her short-term memory loss. There was so much left to be done and I was embarrassed as a writer that I hadn’t wrapped that up. It took me three-and-a-half to four years to get the story.

“I was talking to John (Lasseter), he runs the show and if he wants to do it, we do it. I didn’t even get to the word Dory, I said, ‘Finding...’ and he said, ‘Sure’.”

Then came the pressure bit. He said: “I wasn’t going to go there unless I had the goods. I knew that Dory has just as much interesting stuff to figure out as a main character, if not more, than Marlin did in the first one.

“That gave me confidence as a writer, as far as getting the film to be really good.

“I have spent the last 20 years working other sequels, particulary the Toy Story trilogy, so I am very seasoned on how much hard work it was going to be, and frankly nobody can be tougher on making these films than us.

“The foremost thing is the story itself and getting that working. We take so many wrong turns over the course of four years and making a sequel, you have a bunch of