Celebrity Parents Pregnant Kym Johnson Is 'So Happy' for Twins: She's 'Wanted to Be a Mom for a Long Time' Kym Johnson Herjavec "will be such a wonderful mother," a source tells PEOPLE exclusively By Aili Nahas Aili Nahas Aili Nahas is the West Coast Deputy News Editor at PEOPLE. She is also the TV deputy in Los Angeles as well as the Weddings Editor. Aili has spent nearly two decades in the entertainment industry and 12 years at PEOPLE. People Editorial Guidelines and Karen Mizoguchi Published on December 18, 2017 03:15 PM Share Tweet Pin Email Expectant parents Kym Johnson Herjavec and Robert Herjavec are over the moon that they will soon be welcoming twins. “This has been a roller coaster for them the last few years – meeting, falling in love, getting married and now starting a family,” a source tells PEOPLE about the couple’s nearly three-year romance. (The Shark Tank star is already a dad to three children from his previous marriage.) “Kym has wanted to be a mom for a long time. They’re both so happy,” says the source of Johnson Herjavec, 41, adding, “Kym is feeling great! She will be such a wonderful mother.” The couple revealed to PEOPLE exclusively on Tuesday that they have two babies on the way, one day after Johnson Herjavec confirmed her pregnancy with a too-cute ultrasound photo featuring one of her unborn children flashing a thumbs-up gesture. Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Babies newsletter. Neilson Barnard/Getty Images for Entertainment Weekly RELATED VIDEO: Double the Dancing Shoes! Robert Herjavec and Kym Johnson Expecting Twins For more coverage, follow our babies magazine on Flipboard. In 2015, the former Dancing with the Stars partners fell in love during show rehearsals of the 20th season and continued to date after they were eliminated in week 8 at sixth place. Then in summer 2016, the pair wed in front of family and friends (including DWTS alums Joey Fatone, Lance Bass and Donny Osmond) in Los Angeles. Jason LaVeris/Getty FROM PEN: Watch Jennifer Lopez Tear Up Remembering Her Twins Being Born From Dancing with the Stars to Expecting Twins: Robert Herjavec and Kym Johnson’s Love Story Mr. and Mrs. Herjavec celebrated their first wedding anniversary in July, with Kym teasing PEOPLE Now about wanting children with her husband, 55. “We’re sort of just enjoying being married at the moment. But who knows!” she said. “It feels like we’ve known each other forever. It’s been almost three years since we met. He’s just amazing. We’re best friends, and it’s just easy.” On Thursday, the mother-to-be shared the first photo of her growing baby bump at 18 weeks along. “I’ve popped quite a bit more now,” Johnson Herjavec captioned the mirror selfie along with the hashtag #nomorewaistline.