Gavin Newsom and wife welcome third child

Holding his daughter Montana, California Lt. Gov. Gavin Newsom greets spectators during San Francisco's 43rd annual gay pride parade Sunday, June 30, 2013. As mayor of San Francisco in 2004, Newsom ordered city clerks to issue marriage licenses to same-sex couples. (AP Photo/Noah Berger)

July 4, 2013 1:54:25 PM PDT
It's a girl for Lt. Gov. Gavin Newsom and his wife Jennifer Siebel-Newsom.

Newsom tweeted Wednesday, "Today we welcomed the latest addition to our family. A very healthy baby girl, Brooklynn Newsom. Thank you @JenSiebelNewsom! You r amazing!"

Newsom, his then-pregnant wife and their two children rode in a convertible in Sunday's Pride parade in San Francisco.

Brooklynn joins older sister Montana, who's three, and 1-year-old big brother Hunter.