The couple, who announced their breakup last April, has recently rekindled their romance while on vacation in Toronto, Canada, according to PerezHilton.
The celebrity blogger indicates that the two are extremely happy.
McAdams and Gosling have also confirmed their attendance at the Toronto International Film Festival, taking place September 4 through 13.
The two actors got to know each other in 2004 on the set of the film, The Notebook, in which they played a passionate couple.
When the public learned of their split, several fans were disappointed and even furious, as Gosling described, "Women are mad at me. A girl came up to me on the street and she almost smacked me. Like, ‘How could you? How could you let a girl like that go?’"