Us Weekly reports that Jackson wed his burlesque-dancer girlfriend, Sheila Hafsadi, in a ceremony in Malibu.
"It was a small wedding," a source told the magazine. "Just close friends and family only."
The couple began dating after meeting on a 100 Monkeys tour stop, and they have a son, Monroe Jackson Rathbone VI, who was born in July 2012.
In addition to his husbandly duties, the actor's got a number of projects on the way this year, including "Live at the Foxes Den," "The Dead Men" and "The Concerto."
Leave your well wishes for Jackson and Sheila in the comments and on Twitter!