Josh Hartnett, who is known for his roles in the World War II romance movie, Pearl Harbor and Black Hawk Down opened up about dating in Hollywood.

According to E! News, the 35-year-old actor, opened up to Elle magazine about dating gorgeous Hollywood actresses – and it’s not all it’s cracked up to be.

"I don't recommend it to young actors," Hartnett said. "You can make a lot of enemies in the business that way. But when you work with somebody every day, it's like trial dating. You develop a fantasy about them. It doesn't always work out, does it?"

The actor added that the best way to keeping a girlfriend happy while filming with another woman is to let the girlfriend hang out on set whenever she feels like it.

“Never say the scene is too sensitive. They get very suspicious,” he mentioned.

Hartnett is currently dating former co-star, Tamsin Egerton, according to Daily Mail. The couple have been dating since August 2012 after meeting on set of the action adventure film Singularity.