Her son, Alexander Rafahi Mehran III, was born at 5:30 p.m. on Wednesday near San Francisco, Calif.
“He has 10 fingers, 10 toes, sandy hair, deep blue eyes and is practically perfect, in every possible way!” Rizer wrote on her official blog.
The newborn weighed in at 7 lbs., 13 oz. “Alex and I are very proud parents and incredibly excited to get to know our new little lad,” she said. “We feel tremendously blessed this Thanksgiving!”