Is this the world's cutest 100-year-old grandma?

A HUNDRED-year-old grandmothers don't come much cuter than this!

Kindergarten student Milan joined youngsters across the nation as they dressed up as senior citizens to celebrate their 100th day of school in the US.

In a video filmed be her mother, Melony Clark, 'Grandma Milan' can be seen hobbling her way through her apartment block and asking: "Can you help me get to my house, young lady?"

However, the wig, cane and old clothes can't hide the zeal of youth.

"You're walking pretty fast for an older woman," a cheeky Melony responds.

Photos of 100-year-old kindergarteners were shared by their amused parents as they joined the fun.