Okay, movie buffs, let's play casting director! 'The Idea of You', a story ripe for cinematic adaptation (or perhaps *another* one!), hinges on the electric connection between a confident, older woman and a charming, younger musician. The chemistry has to be undeniable.

Who embodies that effortless sophistication and vulnerability of Sophie, the protagonist? And who possesses the star power and youthful energy to pull off Hayes Campbell, the boy band heartthrob?

It's a tricky balance - they need to be believable as individuals and as a couple defying expectations. Let's forget pre-conceived notions and dive into pure imagination. Share your dream casts in the comments! Who would ignite the screen in 'The Idea of You'?