In James Griffiths' delightfully eccentric comedy "The Ballad of Wallis Island," Charles (Tim Key) is the kind of sweet human being you instantly want all the good things for. It might be tough, for instance,

Mulligan, who plays the role of Nell Mortimer in the upcoming film The Ballad of Wallis Island, revealed she brought her third baby to set after giving birth. “When they sent it to me, I said I'd love to do it, but I will have like a 12-week-old baby,” she tells PEOPLE. “And they were just amazing.”

Subtle shifts are evident right through Wallis Island, as comedy stops sentiment in its tracks, but it also makes the moments of pathos stand out in relief. While audiences will probably expect to laugh, they may be surprised to find themselves shedding a tear or two as well.

The snap, crackle and pop of vinyl marks the start of The Ballad of Wallis Island, a music-themed rom-com that’s half-whimsical com and half-unrequited rom. In the absence of a new film by John Carney,

James Griffiths' warm-hearted dramedy imagines what happens when a lovable eccentric unexpectedly reunites his favorite band on a remote island.

"The Ballad of Wallis Island" resembles a band that continues playing despite the fact that their instruments are clearly out of tune. It's a film that keeps plowing ahead despite exhausting its audience right out of the gate as it tells the story of a lonely man who uses his lottery winnings to try to reunite his favorite band to play a solo show just for him.