Three separate sources have confirmed that the couple will exchange vows within the next few months, according to Us Weekly.
However, the magazine writes that the nuptials will not be an extravagant affair.
"[The wedding] would be intimate and informal," said an insider.
One potential location for the ceremony is the couple's newly-renovated Chateau Miraval in Correns, France, which features a 16th-century chapel.
In May, Pitt revealed that he is considering marrying Jolie as the pair's six children have said that they would like them to wed.
The two actors have said in the past that they would not wed until everyone, whether gay or straight, could marry.
Pitt recently praised the decision to pass New York's Marriage Equality Act, saying that he hopes the rest of the US chooses to follow suit in the future.
Neither Pitt nor Jolie's reps have responded to comment on the marriage claims.
