Benoist and Wood announced their engagement in February. "Yes yes yes it will always be yes," the actress said on Instagram at the time.
Benoist, 30, who portrays Supergirl, met Wood, 31, on set when he was cast as the super heroine's love interest Mon-El in 2016. The pair were first linked together in March 2017.
Benoist was previously married to her Glee co-star Blake Jenner. The divorce was finalized in December 2017.