Chelsea Clinton welcomes baby No. 3: 'We are overflowing with love'

Baby No. 3!

Chelsea Clinton and her husband, Marc Mezvinsky, welcomed their third child on Monday, Clinton announced on Twitter.

"This morning we welcomed our son, Jasper Clinton Mezvinsky," she wrote. "We are overflowing with love and gratitude and can’t wait to introduce him to his big sister and brother."

The 39-year-old daughter of Bill and Hillary Clinton, who announced that she was pregnant back in January, already shares daughter, Charlotte, 4, and son, Aidan, 3, with Mezvinsky, 41.

Clinton and the investment banker tied the knot back in 2010. Mezvinsky is the son of former Iowa congressman Ed Mezvinsky and former Pennsylvania congresswoman Marjorie Margolies-Mezvinksy (who are now divorced) and first met his future wife in 1993 when they were both teenagers at a Democratic retreat in Hilton Head, South Carolina.

Four years later, in 1997, Mezvinsky was a student at Stanford when he gave his longtime friend a tour of the elite university, where she would later enroll. Though she went on to date writer Ian Klaus for four years, following their split in 2005, she and Mezvinsky went public with their own romance, which had been rumored for years.