Tiffany Rose / WireImage 1 / 2
Tiffany Rose / WireImage 1 / 2

Sarah Drew gave birth to son Micah Emmanuel Lanfer on Wednesday evening in Los Angeles, a rep for the "Grey's Anatomy" actress, 31, tells Us Weekly.

Weighing in at 7 pounds, 4 ounces and measuring 19 inches long, Micah is the first child for Drew and her husband, Peter Lanfer.

PHOTOS: Babies of 2011

The then-pregnant star told Us last year that her "Grey's" co-stars had been "incredibly helpful" preparing her and Lanfer for their baby.

"I got great advice about nausea from Ellen Pompeo because I am still dealing with nausea, which is no fun," Drew said. "She's a wealth of information. She's done all the research and looked into every possible way of doing things."

PHOTOS: Other pregnant stars

"I've gotten some great advice from Jessica Capshaw, especially about the brand of Pampers I'm supposed to be using. But I'm like, 'Dude, I have some time.' And I had great advice from Chyler Leigh about breast-feeding."

PHOTOS: Star moms with the best and worst childbirth experiences

Hubby Lanfer was "literally a dream," she gushed to Us. "He's become super protective of my energy level and time," she added of Lanfer, whom she wed in 2002. "He's been amazing. I can't ask for a better partner."


Wedding Bells in 2012

Children of Music Royalty

Celebrity Rebound Couples