London, Dec 23 (IANS) Hollywood actress Natalie Portman is romancing Chris Hemsworth, elder brother of Miley Cyrus' Australian boyfriend.

Portman met 'Star Trek' actor Hemsworth after they were cast together in the forthcoming movie 'Thor', reported contactmusic.com.

Shooting is expected to begin in January next year, but the two are dating already.

'Sparks have been flying since their first meeting. He seems to have a crush on her and she clearly loves the attention,' said a source.

Portman had been single since splitting from folk rocker Devendra Banhart last year.