The couple posed on the red carpet in Los Angeles on Thursday night, ending speculation that they split up. It was the first time they made an official public appearance together this year.
The duo have only been spotted together a few times in the last few months. Last summer, the pair got engaged and they were supposed to wed later this year.
Hemsworth's new film, "Paranoia," centers on Adam Cassidy, a smart young executive who is fingered for corporate malfeasance and ordered to infiltrate a high-tech rival.
The film hits theaters on Aug. 16.