It's that time of the year when little ones knock on your door for trick or treat. Admittedly, Halloween is one day of the year when boys and girls get the chance to resemble their spirit animal or their idol.

While most kids run around the neighbourhood on Halloween, Hollywood celebs always go the extra mile. Special parties are organised and an elaborate albiet spooky decor is crafted to make celebrity babies enjoy a festival that's dedicated to remembering the dead. 

In case you're wondering how to dress up your little one this Halloween, take a look at costumes that have been tried and tested by celeb babies. Nevertheless, kids look cute in anything as long as they smile. 

Kim Kardashian's daughter, North West as Elsa

Kim Kardashian's daughter has always had the cutest Halloween costumes. If baby North West looked like former Vogue editor, André Leon Talley once, she and her cousin Penelope Disick dressed as skunks the next year. However, Kim K recently revealed what P and North West might wear this year. And they are keeping up with the times. In Kim's picture, North is dressed as Frozen princess, Elsa and her cousin Penelope is dressed as Anna. 

Beyonce's daughter, Blue Ivy as Michael Jackson

Bey and Jay-Z's daughter, Blue Ivy, already has swag. In 2014, Beyonce dressed her 3-year-old as the King of Pop, Michael Jackson. The look was complete with a red Michael Jackson military jacket, aviators, a hat and shiny white gloves. And of course, she was armed with a pink microphone.

Mario Lopez's kids as Marilyn Monroe and Elvis Presley

Mario Lopez's family is adorable, fun and experimental. "The Extra" host and his family dressed as Marilyn Monroe and Elvis Presley and posted a picture on Instagram. Mario's wife, Courtney Laine Mazza and daughter Gia Francesca Lopez were dressed in the Hollywood star's iconic pink strapless dress and accessorised it with a blonde wig, pink gloves and some serious attitude.

The boys in the family dressed as Elvis Presley by donning a jumpsuit, embellished with rhinestones, sunglasses and a hairstyle that could only match them.

Kourtney Kardashian's kids as superheroes

The eldest of the Kardashian clan, Kourtney  Kardashian dressed as Wonder Woman (one of the popular Halloween costumes for 2015) and posted an adorable photo of her kids in superhero costumes. Her eldest kid, Mason Disick seems to be in love with Blue Lantern Flash or just superhero powers.

Neil Patrick Harris's Twins as Flash and Mermaid

David Burtka and Neil Patrick Harris's twins have evidently decided to celebrate Halloween with a costume that's emerged from the bowels of their imagination. Recently, David tweeted a photo of his twins and said, "The kids had their Halloween concert today they wanted to go as the Queen of Mermaids and Captian Color Pants!"