Another Hollywood couple is ruining it for the rest of us normal folks.
"They're both thrilled," says Johansson's rep Marcel Pariseau.
The couple has been dating for more than a year. There is no wedding date set yet.
Reynolds, 31, was once engaged to fellow Canadian, singer Alanis Morissette, but they broke up in February 2007. A month later, Reynolds and Johansson, 23, started going out together in public.
Reynolds is currently filming "The Proposal" with Sandra Bullock in Boston. He last starred in "Definitely, Maybe." Johansson's latest credits include "The Other Boleyn Girl," "The Nanny Diaries" and the upcoming "He's Just Not That Into You."