The wedding ceremony was held in La Jolla on Sunday, May 28, confirmed Us weekly.
The 33-year-old "Lost" star and the Two Bit Circus CEO were engaged after she was spotted trying on wedding dresses at Claire Pettibone in West Hollywood.
The two made their romance Instagram official when Grace posted a photo with him in early February, writing, "The strongest and sweetest songs yet remain to be sung (Whitman)."
Grace was previously engaged to director Matthew Cooke in 2015. The former couple split in February 2016.