Thursday, Ashlee Simpson and husband Pete Wentz became parents for the first time, when their son named Bronx Mowgli Wentz was born at Cedars-Sinai Medical Center in Los Angeles.

Simpson-Wentz, 24, and her son are both doing well after the delivery, a spokesperson quoted by People magazine revealed.

American pop rock singer-songwriter Ashlee Simpson is the younger sister of pop singer Jessica Simpson, who has caught the attention of tabloids many times over the years.

Ashlee rose to fame back in 2004, when she released her debut album “Autobiography,” along with the reality series “The Ashlee Simpson Show,” both productions having then gained much critical acclaim.

Simpson-Wentz’s second album called “I Am Me” hit the markets in October 2005, followed by “Bittersweet World,” which was released this year, in April.

On May 17, 2008, the singer married “Fall Out Boy” bassist Pete Wentz, after they had announced their engagement on April 9.

Eleven days later, the couple revealed, via “Fall Out Boy's” official website, that they were expecting their first child.

Pete Wentz, 29, is best known for his work with the Chicago-based aforementioned band.

He is also author to a book called „The Boy With the Thorn In His Side,” which stemmed from the nightmares he used to have as a child.

Currently, he is co-authoring a book alongside William Beckett, lead singer of the band „The Academy Is...”

Wentz owns Clandestine Industries Company, which specializes in the distribution of books and clothing.