Amanda Seyfried's love life is red-hot on and off-screen!

The former teen queen, who has been earning rave reviews for her portrayal of Deep Throat star Linda Lovelace in Lovelace, has reportedly found a new beau in A Case of You star Justin Long.

According to Us Weekly, "Justin is super private about his relationships, [so] I'm not positive how they exactly met, but they've known each other for awhile, when they were seeing other people."

Prior to her relationship with Justin, Amanda was most recently linked to Dexter star Desmond Harrington, while Justin carried on a multi-year romance with Drew Barrymore, whom he referred to, in a letter to Movieline, as "the most beautiful girl in the world."

The source says that, despite Amanda and Justin's propensity for long-term relationships, they're taking their time to see if this one is a natural fit. "They recently started hanging out more, going on date-like activities. They're both busy … but they're seeing where it goes."

It looks as though the pair may be ready to take things public soon, as Justin recently showed up at an event for Lovelace and stuck by Amanda for the entire evening.

"Justin came alone and stayed close to Amanda all night," says an eyewitness. "They weren't making out or anything like that, but they were just inseparable during the event. He hung out when she talked with others."

Source: Us Weekly