The couple married Friday before 112 guests at the Sunstone Vineyards and Winery, the magazine reported Saturday.
"No matter what the day, we go to sleep laughing, and we wake up laughing," the couple told People. "We can't imagine a love any better than this."
Murdick, 32, wore an Eve of Milady gown and Vera Wang shoes, while Dunham, 50, wore an Armani tuxedo. "Shrek II" director Kelly Asbury served as best man alongside Andy Smith, the designer of the Michael Keaton batmobiles and Christian Bale's Batman tumbler, People reported.
This is the second marriage for Dunham, who has three daughters from his previous relationship. His eldest daughter Bree escorted him down the aisle at the wedding.
The couple, who have been together since 2009, will honeymoon in Vermont and Napa Valley, Calif. Dunham is scheduled to go on the road Nov. 1 for his "Disorderly Conduct" tour, and will be accompanied by Murdick who is his fitness trainer and nutrition consultant.