Paper Man (2009)

I stumbled across Paper Man years ago while I was scrolling through Emma Stone's filmography and, since I love her, it ended up on my watchlist. But eventually, it got lost among the thousands of movies in there. 

The film follows Richard Dunn (Jeff Daniels), a 40-something failed writer who still talks to his childhood imaginary friend, Captain Excellent (Ryan Reynolds). When his wife Claire (Lisa Kudrow) drives him to Long Island and leaves him there, alone, so that he can finish his book, Richard meets Abby (Emma Stone), a 17-year-old whom he hires to babysit, despite the fact that he has no kids. When she finds out, Abby seems completely fine with it and the two start to bond.