Emma Watson, the actress best known for playing Hermione Granger in the Harry Potter series, has often been private about her personal life. While there are a few reasons why she hasn’t married, one major factor could be her focus on her career, activism, and personal development. She's been quite vocal about her desire for independence and how she doesn't necessarily feel the societal pressure to get married or settle down at a certain age.
She’s also been involved in a lot of important causes, like women’s rights, and has made a conscious effort to focus on her work in these areas rather than on traditional life milestones like marriage. Plus, relationships are deeply personal, and it's possible she's waiting for the right person or is simply content with where she is in her life.