The couple met while co-starring in the Roundabout Theatre Company's production of 110 in the Shade.
McDonald is currently on Broadway in The Gershwins' Porgy & Bess at the Richard Rodgers Theatre. She is a four-time Tony Award winner for Carousel, Ragtime, Master Class and A Raisin in the Sun, and also appeared on Broadway in Marie Christine. Her film and television credits include Private Practice and Wit.
Swenson is currently on Broadway in Priscilla Queen of the Desert the Musical at the Palace Theatre. He received a Tony Award nomination for Hair and appeared in the New York Philharmonic's production of Camelot.
The couple were both previously married to other people and have children from those unions.