The beautiful actress has confirmed she is to wed Hollywood agent Jim Toth, whom she has been dating for almost a year.
"They are extremely happy," Reese's rep told American publication US Weekly.
The 34-year-old Oscar winner started dating Jim in January after she split from Jake Gyllenhaal. They went public with their relationship two months later.
Forty-year-old Jim is said to have bonded with Reese's two children Ava, 11, and Deacon - seven - from her six-year marriage to Ryan Phillippe.
Jim - who has just been named one of the new heads of the Creative Artists Agency's motion picture talent department - is a regular on family outings, including their Sunday church visits.
Engagement rumours began circulating earlier this month after Reese's attractive other half was spotted at several upmarket LA jewellers.