"Being around someone like Jen, who is so honest and laughs all day long, I am forced to be in the right now," he told the Associated Press. "I'm much happier."
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The "Hunger Games" actor underwent a major lifestyle change last year: He called off his engagement with pop star Miley Cyrus, purchased a $6.8 million home in Malibu, Calif., and traveled the world for multiple movie roles.
"I'm more comfortable in my own skin than I've ever been," he said. "For a few years I went down a path where I forgot to be in the moment."
Aside from J.Law, Liam also said he found a kinship with his "Hunger Games" co-star Woody Harrelson, with whom he spent a lot of time in Europe while filming the hugely successful franchise.
Some things, however, haven't changed for him. The ruggedly good-looking actor has continued to get physical with activities, like boxing and surfing. He's also remained close with his family, which includes brother, Chris Hemsworth.
"We come from a very close family," Liam told Us Weekly of his brothers and fellow actors Chris and Luke. "We all understand how lucky we are."