It’s a Memorial Day weekend wedding!
The actors will wed on Sunday in a ceremony in the Santa Barbara area of California, PEOPLE confirms.
Grace, 37, and Hinshaw, 27, began dating in early 2014.
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Hinshaw, who appeared in the second season of HBO’s True Detective, has just completed work on the independent film Me Estés Matando Susana.
Grace has three new film projects set for release this year: horror thriller Delirium (alongside Patricia Clarkson), musical comedy Opening Night (alongside Taye Diggs) and dramedy War Machine (alongside Brad Pitt).
• Reporting by ELIZABETH LEONARD