United Kingdom, Sept. 6 -- Harry Styles is said to be in the "happiest" place of his life after beginning a new relationship with Zoe Kravitz.

The 31-year-old former One Direction star has been photographed walking arm in arm with actress Zoe, 36, in Williamsburg, Brooklyn, this week on their latest date after they were first linked romantically when they were seen together in August in Rome, where they shared a romantic walk through the city. Zoe, who owns an apartment in Williamsburg, previously shared the property with her ex-fiance Channing Tatum.

And a source told Page Six: "It's so hard to date as a celebrity. Harry wouldn't have gone public with Zoe if it wasn't anything.

"It's very new and fresh and they're just having fun."

T...