Kym, 41, and Robert, 55, were thrown an extravagant baby shower on Saturday, which also served as a gender-reveal party.
At one point in the day, the couple popped two giant black balloons filled with smaller pink and blue balloons as well as multi-colored confetti. Kym was absolutely beaming from ear to ear, while Robert also flashed a huge smile upon learning the big news.
The sweet moment was captured on tape, and both Kym and Robert share a video of the balloons popping on their separate Instagram accounts.
Kym said she's "so excited" about being pregnant with a boy and a girl, saying it's the "best of both worlds."
The pro dancer also shared photos from the party of the couple standing with Carson Kressley, who hosted and decorated the party.
The Queer Eye for the Straight Guy star -- who previously competed on Dancing with the Stars -- set up a lavish display of baby blue and pink hydrangeas, pastries to munch on, and even life-size flamingos.
But this shower was actually Kym's second, as Robert threw his wife a baby shower in January 2018 in Australia, where her family lives.
Kym announced her pregnancy with twins in December 2017, and she's been sharing photos of her growing baby bump ever since.
Kym and Robert met and seemingly fell in love on Dancing with the Stars' 20th season in Spring 2015 when they competed as a professional and celebrity pairing, and they continued to date after finishing the competition in sixth place.