Actor Alfonso Ribeiro announced via Twitter his wife, Angela Unkrich, has given birth to their first child, a son, in Los Angeles. \"Alfonso Lincoln Ribeiro Jr. was born today at 10:45 a.m.,\" Ribeiro tweeted late Sunday. \"We are so blessed. ... We also want to thank our amazing Dr. Jason Rothbart. He was so great and a calming influence in the room.\" \"They are all healthy, happy, and exhausted,\" the actor\'s publicist later told UsMagazine.com. Afonso Jr. weighed in at 7 pounds, 10 ounces, and measured 21.5 inches when he was born, the celebrity news website said. Ribeiro and Unkrich were married last October. Ribeiro also has an 11-year-old daughter, Sienna, with his ex-wife Robin Stapler.