Theron, Penn inseparable during Mexican vacation?

Charlize Theron and boyfriend Sean Penn are said to be inseparable during their Valentine's Day holiday in Mexico.

The actress and Penn started dating about a month ago. Penn, 53, and Theron, 38 stayed in a private ocean view villa, complete with its own pool, reported People magazine.

"They were inseparable. They held hands everywhere they went," a source told the magazine.

"Before dinner one night, they held hands and took a stroll around the pool, looking at the beach. They looked completely enamored with each other," the source added.