by Lauren Turner 0

Alessandra Ambrosio welcomed her second child into the world on Sunday. She and fiancé Jamie Mazur shared their excitement on Twitter, with Jamie writing, "Welcome my son, can't wait to show u around this crazy place." The baby boy joins big sister Anja, who will turn 4 in August.

Alessandra got a head start on celebrating the upcoming arrival with a recent baby shower, and she shared pictures of the bash and her growing bump with Vogue Brazil. Congrats to Alessandra on her new family of four!