The Truth About Hilary Duff's New 'Do

(photo via Instagram)

A new husband isn't the only thing Hilary Duff has been toting lately. The star took to Instagram to show off her post-wedding hair, and it's noticeably longer and thicker than we've seen on her before.

The secret? Extensions, obviously. "I want mermaid hair," Duff told her go-to stylist and 901 co-founder Riawna Capri. Working with 901 artist Lisa Satorn, Capri used Great Length Extensions to make that happen for her.

But, that's not all. The duo also applied the Crystal Cashmere in-salon treatment to the extensions before putting them in her hair so her hair looked healthy, shiny and smooth. Plus, they used Magic Myst to prep her hair and style it in the effortless, mermaid way she wanted.