Sam Wallace shares adorable photos of his twin's first day at preschool

Watching our babies grow and develop over the first couple of years is very exciting as so much happens.

And for Sam Wallace, today marked a new milestone for his identical twin girls ...

Sienna and Cosette – who turned two on January 21 – had their first day at preschool!

Taking to Instagram, the father-of-three shared an adorable collection of photos of the siblings as they headed off for their big adventure with their older brother Brando.

In the pictures, the girls can be seen leaving their house with their matching pink backpacks (that are of course almost as big as they are).

Alongside the family snaps, Sam wrote: "First day at preschool for the girls! And big brother is as proud as punch! Big day for the Wallace family 💕💕."

Too cute.