Ashley Graham, Husband Justin Ervin Expecting Twin Boys; Watch Their Reaction [Video]

Ashley Graham will soon welcome twin boys with her husband Justin Ervin.

The 33-year-old model made the announcement Monday via Instagram, sharing a sweet video documenting the moment they learned that she was pregnant and that they were expecting two babies instead of one.

The clip started with Graham and Ervin reading the results of her pregnancy tests. "I guess two confirmed tests mean that I'm pregnant," she said before leaning in to kiss her husband.

The video then shows Graham's doctor's appointment. The model can be seen lying on a bed while the doctor is moving a fetal doppler on her baby bump. "Is that twins?" she asked the doctor. "That's a penis...and that's a girl."

However, the doctor corrected her and said that she's actually having twin boys.

Graham, who is already a mom to 20-month-old son Isaac Ervin, immediately sat up in shock, as her husband quipped, "You're joking me." The model then said, "We're gonna have three boys!" before laughing.

Graham's post was flooded with congratulatory messages for her and Ervin.

"Amazing!!! Congrats to you both," Valeri Lipovetsky commented. "Ashley, I’m crying, those boys chose such an amazing mommy," Taylor Giavasis wrote.

"Omg! Congratulations [times two], queen mama!" Sara Shakeel wrote.

"THE SECRET'S OUTTTTTTT!!!! So happy for and love you both!!!!!" Anthony Evans added.

Graham first announced that she was pregnant with her and Ervin's second child in July.

"The past year has been full of tiny surprises, big griefs, familiar beginnings and new stories. I’m just beginning to process and celebrate what this next chapter means for us," she wrote on Instagram alongside a photo taken by her husband of herself cradling her baby bump.

Graham and Ervin, who tied the knot in 2010, welcomed their first child Isaac in January last year. "At [6 p.m.] on Saturday, our lives changed for the better," she announced on social media at the time. "Thank you for all your love and support during this incredible time."

Earlier this year, the model spoke about motherhood during an interview with E!'s "Daily Pop."

"It taught me a lot about patience," Graham said of being a mom, "how selfless being a parent is, and truly, how I don't really need that much space to operate during the day."