The Mariano tribe has spoken — it needs a new member.

"Boston Rob" Mariano, 38, and Amber Brkich, 35, met while competing in Survivor: All-Stars, which she won in 2004. They got engaged during the All-Stars live finale and were married in April 2005. He went on to win Survivor: Redemption Island in 2010 — and hopefully he saved some of that $1 million prize since he just revealed they are expecting their fourth child!

Rob tweeted the sonogram shown below on December 31, writing, "My wife Amber is so hot, I can’t keep my hands off her… Here is to 2014!!! #4"

Nice! The couple, who also competed on CBS's The Amazing Race, already have three little girls: Lucia Rose, 4.5; Carina Rose, 3; and Elisabetta Rose, 20 months. Good money says, if they welcome another girl, her middle name will be Rose.

In June 2012, Amber told Us Weekly, "I love having three little girls. Dressing them alike is so much fun, and they love it too!" She said it's also great having the kids be so close in age. "They play so well together!" Hopefully that's the case with Baby No. 4 too, whether it's a he or a she.

Congrats to the Survivor winners on their growing family! Maybe Amber can compare her baby bump to Survivor: One World winner Kim Spradlin, who announced her first pregnancy back in July, and is due on her own birthday, January 30.

Sources: PeopleTwitterUs Weekly

Credit: Twitter