(CNN) Emma Watson has said she prefers to call herself "self-partnered" rather than single as she approaches her 30th birthday.

Watson, 29, who rose to fame as Hermione Granger in the Harry Potter films, coined the phrase in an interview with British Vogue in which she discussed the pressures of turning 30.

The actor and activist, whose birthday is in April, said she initially did not understand the "fuss" that surrounded the milestone.

More recently, however, she admitted feeling "stressed and anxious" about her upcoming birthday.

She told British Vogue: "If you have not built a home, if you do not have a husband, if you do not have a baby, and you are turning 30, and you're not in some incredibly secure, stable place in your career, or you're still figuring things out... There's just this incredible amount of anxiety."

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