The couple have welcomed a "beautiful" son, the actress' rep tells the site. "Parents and baby are all doing well." Further details about the new addition were not available.
This is the first child for Wood, 25, and Bell, 27, who announced they were expecting in January. They tied the knot last October after meeting on the set of the Green Day music video "Wake Me Up When September Ends."
It was recently announced that Bell will headline the new AMC period drama Turn, which premieres on the network next year.