The 23-year-old star - who was recently reunited with her boyfriend Scott Sinclair - has revealed plans for her own wedding are inspired by the Duke and Duchess of Cambridge's ceremony in 2011 and how personal it was despite its grandeur.
She told The Sun newspaper's TV Magazine: ''People imagine I would want a massive wedding but I don't.
''I'm a Kate Middleton obsessive and I loved her wedding. It was the biggest wedding in the world, but actually just about her and Prince William.
''I don't want mine and Scott's to be about just one day, I want it to be about the rest of our lives together. First I want a baby with Scott then we'll get married and the wedding will be simple, spiritual and meaningful.''
While the former 'Coronation Street' actress' marriage plans are on hold until she's had her first child, that may not be too far in the future.
Helen admitted she is ''the broodiest woman in Britain'' and wants to be expecting by ''this summer''.
She said: ''I want to get pregnant this summer. It's absolutely going to happen. I'm obsessed with kids. I'm probably probably the broodiest woman in Britain.
''Scott knows I want loads of kids and he's totally up for it. I talk about it all the time. The plan is to have four children and then adopt one or two more.''
Take a look back at October's inaugural event.
The film is expected to continue without Mendes' involvement.