Josh Harnett & Abbie Cornish Go Public -- Sort Of

Abbie Cornish attends the premiere of Jessica Alba and Kate Hudson‘s new movie, The Killer Inside Me, during the 2010 Tribeca Film Festival at NYC’s School of Visual Arts Theater on Tuesday (April 27).

The Aussie actress and actor Josh Hartnett made their romance public at a private dinner Saturday (April 24) at Macao Trading Co. on Church Street.

According to Page Six, Josh, 31, and Abbie, 27, helped Channing Tatum celebrate his 30th birthday hosted by artist and Dactyl founder Neil Grayson.

Other guests included Chan‘s actress wife, Jenna Dewan; Haylie Duff with her actor boyfriend, Nick Zano; and Chan‘s Son of No One co-stars James Ransone and Ray Liotta.