Cage, 47, donned a black tuxedo for the occasion. His son Weston, 20, wed musician Nikki Williams, 22, after getting ready at the famed Omni Royal Hotel. Says a source at the hotel of Weston: "He looked good in a tux."
The family then headed off in a limo, and celebrated on a yacht on Lake Pontchartrain.
"Nic was smiling and happy as he toasted the happy couple on the back of the boat," a source tells PEOPLE.
Weston and Williams, both musicians, got engaged just last week. On Saturday, Williams tweeted: "Weston presented me with my GORGEOUS ring last night in front of a giant bonfire and the Fire Department showed up."
Splash News Online
Reporting by MATTHEW DAVIS