This little boy singing to his late baby sister will give you all the feels

Grab a tissue and prepare to have your heart grow a size or two.

A video of a four-year-old boy crooning one of the songs from the movie Coco to honor the upcoming birthday of his late baby sister is capturing the hearts of people everywhere.

My son singing "Remember Me" from the movie "Coco" to his baby sister, Ava, who we lost this past May.

He's only 4 years old and he understands. He didn't even know he was being recorded. He just wanted to sing to her for her 1st birthday! Happy Birthday mamas, we miss you!pic.twitter.com/EoVLjju0bJ — Samir (@SAM1R) December 31, 2017

The new Disney movie is all about Mexico's Day of the Dead holiday, in which deceased relatives are remembered, and it certainly hit home for little Alex Vasquez, whose sister Ava died in May, when she was just four months old, from a kidney condition. This video shows how the movie is able to open up the subject of death to kids in an approachable, comforting way. 

Alex has seen the movie twice, and on Ava's first birthday, he grabbed his toy guitar and started strumming and singing the song "Remember Me" in front of an altar that his parents, Samir and Stephanie Deais, have in their home. His mom captured it while she was cleaning and the short clip has already been viewed over 1.4 million times.

Great job, Alex, and our heart goes out to you and your family.

Read more:
18 books to help kids cope with death
How to explain death to a child