A rep confirmed the news to People.com, which published a photo of the happy couple featuring Gilbert in a bright red dress.
This is the third marriage for each of the stars. Gilbert has two children, and Busfield has three. The pair got engaged over Christmas after knowing each other for over 20 years.
Gilbert most recently appeared on the 14th season of "Dancing With The Stars" and is most known for her childhood role on "Little House on the Prairie." Busfield has made appearances on several TV shows, including "Law & Order," "Blue Bloods," and "The Mob Doctor." He is most well known for his role in the 1980s series "Thirtysomething."