The two exchanged vows Saturday night in Croton-on-Hudson, after their New Year's engagement while on vacation in Puerto Rico.
It is the second marriage for both actors, who both have children from their previous relationships. McDonald has an 11-year-old daughter, Zoe Madeline, 11, and Swenson has two sons, Bridger, 11, and Sawyer, 8.
The couple told People they look forward to their new life together as a family.
Celebrity Breakups and divorces of 2014 [PHOTOS]