The duo headed to the Arc Light theater in Hollywood and showed a little PDA on the way back to their car.
Josh and Tamsin, an English actress and model, started dating last Spring after meeting while filming 2012's Singularity.
The actor -- who has previously been romantically linked to Kirsten Dunst and Mischa Barton -- amazed fellow guests at Channing Tatum's 30th birthday party on Saturday by spending the majority of the evening with the Down Under stunner.
The pair arrived together for the private dinner at Macao Trading Co. Read Full Story Actor Josh Harnett signs autographs for fans outside the Apollo theatre where he is performing in ' Rain Man'. (Photo by Flynet Pictures) According to the BBC, actor Josh Hartnett is suing The Daily Mail over reports that he was caught on a security camera doing the nasty with an unnamed woman in a public area of the Soho, London hotel where he is staying.
The push and pull between Hartnett’s tortured Ethan Chandler and Green’s equally tortured Vanessa Ives is so natural it almost feels unplanned — so when Hartnett stopped by Radio (Sirius XM, channel 105), we asked him if it was.