Actor Liam Hemsworth is reportedly dating his “Independence Day: Resurgence” co-star Maika Monroe.

The “The Last Song” actor, who split from singer Miley Cyrus in late 2013, was spotted getting cosy with Monroe at a party here last weekend.

"His hand was on her b*** as she was grinding into him and they were making out at the bar. Liam was draped all over her. It was so PDA and in-your-face," said a source.

While the duo appeared to be comfortable together at the July 4 bash hosted by director Roland Emmerich, another source close to the 22-year-old actress insists their romance isn't serious yet.

"They're not official. But their chemistry is ridiculous," another source said.