Us confirmed in April that the San Francisco 49ers running back, 30, and Avagyan, 27, were expanding their family. The couple are already parents to 2-year-old daughter Briseis.
"@reggiebush love the way you love. We are so blessed to have you baby," Avagyan captioned an Instagram pic of the athlete and his toddler on Father's Day. "Hats off to the ones that give it all they got and more."
On July 6, Bush also posted a photo of his love. The pregnant model looked gorgeous in an all-black outfit while caressing her baby bump. "Coming soon…" he gushed.
Bush and Avagyan tied the knot in July 2014. Prior to their romance, the athlete famously dated Kim Kardashian for several years until March 2010; Kardashian is currently expecting her second child with husband Kanye West.
E! was first to report Bush's baby news.