It’s a perfect day for fans of Disney’s Elsa and Anna as a trailer for Frozen Fever is released – unveiling a new song.

Frozen Fever, a spin-off from the hit 2012 movie Frozen, sees Kristen Bell, Idina Menzel, Jonathan Groff and Josh Gad reprise their roles as Princess Anna, Princess Elsa, woodsman Kristoff and snowman Olaf for a seven minute short film.

And it features new song The Perfect Day from the husband-and-wife team of Robert Lopez and Kristen Anderson-Lopez, who won an Oscar for Let It Go.

Frozen Fever sees Elsa throwing her sister Princess Anna a birthday party.

Elsa wants Anna's day to be perfect (Disney)
Elsa wants Anna’s day to be perfect (Disney)

Josh said: “The gang is back together. And literally it’s like we never went away. Every day we’re reminded of Frozen in our lives. So it feels like a continuation of a saga that has many parts still untold. It felt like coming home again after a short absence.

“We continue this story of these two sisters, who only had each other growing up together. They are still supporting each other. That’s what this is about.”

Elsa's plans for Anna's birthday goes awry (Disney)
Elsa’s hopes for Anna’s birthday don’t quite go to plan (Disney)

Frozen Fever will be shown in cinemas before Disney’s live-action Cinderella, which opens on March 27, 2015.