John Legend and Chrissy Teigen Welcome Baby Daughter

PHOTO: Chrissy Teigen, left, and recording John Legend attend the 88th Annual Academy Awards at Hollywood & Highland Center, Feb. 28, 2016 in Hollywood, Calif. PlayEthan Miller/Getty Images
WATCH John Legend and Chrissy Teigen Welcome Baby Daughter

John Legend and Chrissy Teigen's family just got a little bigger.

The model announced on Instagram Sunday she and the musician welcomed their first child -- a baby girl.

"She's here! Luna Simone Stephens, we are so in love with you! And sleepy. Very sleepy," she wrote next to a photo that detailed Luna was born 6 pounds and 11 ounces.

She's here! Luna Simone Stephens, we are so in love with you! And sleepy. Very sleepy. ????????

A photo posted by chrissy teigen (@chrissyteigen) on Apr 17, 2016 at 7:32am PDT

Legend, 37, also shared more details about his daughter's birth on Twitter, including her birthday. He wrote, "Our new love is here! Luna Simone Stephens, born on Thursday, the 14th. We couldn't be happier!"

The two, who wed in 2013, announced they were expecting their first child in October.

Teigen, 30, was open about her struggle to conceive. On her daytime talk show "FABLife," the model spoke about her struggle to get pregnant during an emotional discussion.

"I will say, honestly, John and I were having trouble," Teigen confessed. "We would have kids five, six years ago if it'd happened. But my gosh, it's been a process!"