Emma Watson is single again after splitting from boyfriend of two years, tech entrepreneur William ‘Mack’ Knight.

The private couple had last been seen together on May 25 on a dinner date in New York City.

Emma WatsonEmma Watson is single again after splitting from boyfriend William ‘Mack’ Knight

A source confirmed the split to US Weekly, revealing that the couple went their separate ways earlier this year.

When asked to comment by the magazine Watson’s rep told Us Weekly: “I’m afraid I don’t comment on my client’s personal life.”

Watson and Knight were first seen together in October 2015 on a date to watch Broadway musical Hamilton.

The brainy couple seemed like a perfect match, with Watson a graduate of Brown University and Knight graduating from Princeton in 2003 with a Bachelor’s in Ecology and Evolutionary Biology. He later gained an MBA from Columbia Business School.

The couple also seemed to be pretty serious, with Knight’s mother telling the Daily Mirror in February that she had met the actress.

"I have met Emma, and she’s a wonderful girl,” Katherine Knight said. “We don’t see them very often because he’s busy and working very hard."

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Watson preferred to keep their relationship private, telling Vanity Fair in February: “I want to be consistent. I can’t talk about my boyfriend in an interview and then expect people not to take paparazzi pictures of me walking around outside my home. You can’t have it both ways.

“I’ve noticed, in Hollywood, who you’re dating gets tied up into your film promotion and becomes part of the performance and the circus. I would hate anyone that I were with to feel like they were in any way part of a show or an act.”