Elizabeth Smart gives birth to baby girl

(Rick Egan | The Salt Lake Tribune) Elizabeth Smart speaks about the pending release of Wanda Barzee, during a news conference on the steps of the Utah State Capitol. Thursday, Sept. 13, 2018.

Kidnapping survivor Elizabeth Smart has given birth to her third child.

Smart announced the birth on her Instagram account Monday with a picture of her holding new daughter Olivia as husband Matthew Gilmour looks on.

In her post, Smart says "So happy to welcome Olivia to our family!"

In 2002, the 31-year-old was kidnapped at age 14 from her Salt Lake City bedroom by street preacher Brian David Mitchell and held captive for nine months. Mitchell was sentenced to life in prison for kidnapping and raping Smart.

Mitchell's wife, Wanda Barzee, was also in prison but was unexpectedly released in September.

Smart, who has become a child safety advocate, spoke out against Barzee’s release. But she has said she won’t let it stop her from living her life.