Chrissy Teigen shares first photo of newborn daughter Luna

Thrilled supermodel mom Chrissy Teigen posted the first photo of her beautiful baby girl on Instagram Tuesday, April 19th.

Teigen and singer John Legend announced Sunday, April 17th that they had welcomed a baby daughter into the world, but this is the first sight of Luna Simone Stephens, who already has a nickname, it seems: "Hi my lulu!" Teigen wrote in the caption.

Luna was born weighing 6 pounds, 11 ounces, and already has a healthy head of hair. Teigen wrote, "She's here! Luna Simone Stephens, we are so in love with you! And sleepy. Very sleepy."

"Our new love is here!" Legend tweeted. "We couldn't be happier!"

The couple had been trying to conceive, but "it was not an easy road having a baby," a source told E!, adding that the trials have made Luna's birth that much more of a blessing.