Harper Seven Beckham debuts on Facebook, Twitter (Photos)

Harper Seven Beckham, the fourth child of celebrity couple Victoria and David Beckham, made her public debut via Twitter and Facebook on Sunday , a week after her birth.

Proud parents Victoria and David took turns in posting the first photos of Harper Seven on the social media sites.

On his Facebook fan page, David posted a picture of their first baby girl being cradled by Victoria along with the message, "I took this picture of my two girls sleeping."

Photo of Harper Seven Beckham and her mom Victoria revealed by her dad David on Facebook

And over on her Twitter account, Victoria tweeted a photo of David holding their newborn, writing, "Daddy's little girl!"

Picture of baby Harper Seven Beckham and dad David shared by her mom Victoria on Twitter

Harper Seven was born on July 10, 2011 at 7:55 a.m. at Cedars-Sinai Hospital in Los Angeles. She joins older brothers Brooklyn, 12, Romeo, 8, and Cruz, 6.

According to a US Weekly article, the little girl was named after an old English name and the number seven.

"Harper is an old english name that [Victoria] has always liked," a source close to Victoria told US Weekly.

"Seven is a very spiritual lucky number. She was born in the seventh month, in the seventh hour."the source added.