In September 2017, Julia married her fiancé Preston Cook. Per USA Today, they met on the set of her movie Blackway, where Preston was working as a camera assistant.

After tying the knot, the two lovebirds welcomed their first child, son Strummer Newcomb Cook. Their second child, daughter Arlo, arrived in January 2022.

Source: https://www.distractify.com/p/whatever-happened-to-julia-stiles