Adriana Lima 'Overjoyed' to Welcome Her Second Daughter Sienna

Photo credit: Dan Jackman/WENN

Congratulations are in order for Adriana Lima. The 31-year-old Victoria's Secret Model has delivered her second child, a baby girl named Sienna. According to ET, the bundle of joy was born on Wednesday, September 12 at 1 P.M., weighing in around 7 lbs at time of birth.

"Marko and I are overjoyed to welcome Sienna into our family, and Valentina is looking forward to becoming a big sister," Adriana informed her half-a-million Twitter followers. She and basketball player husband Marko Jaric welcomed their first daughter in November 2009.

Adriana and Marko got married in February the same year. "My favorite job in the world is being a mom! My family could not be more happy to announce this news!" the supermodel gushed when announcing her second pregnancy last March.

The couple decided not to find out about the sex of their second child because apparently they wanted it to be a surprise for them. "For the rumors about the gender of my and Markos baby I would like to make clear that both me and my husband don't know," she tweeted recently.