She decided to begin her acting career straight out of high school rather than attend NYU.
She married Chris Robinson in 2000. The couple had a son named Ryder in 2004 and divorced in 2007. Her brother is Rules of Engagement star Oliver Hudson and her mother is actress Goldie Hawn. She had a son named Bingham with Muse frontman Matthew Bellamy, whom she was engaged to until the couple split in December 2014. In 2017, she began dating Danny Fujikawa. She and Fujikawa welcomed a daughter named Rani in 2018. On September 13th, 2021, Hudson and Fujikawa announced their engagement.