Reese Witherspoon sends the Internet into meltdown by sharing picture of her lookalike SON!

We all know fans are left seeing double when the Hollywood star shares photos of her teenage daughter, Ava Phillippe.

But now fans are freaking out over a recent Instagram post of her youngest son, Tennessee.

With their matching blonde locks, big blue eyes and full-lipped smiles, the apple hasn't fallen far from the tree.

One fan commented "Mini Reese right there!!"

The 4-year-old is absolutely adorable!