Bindi Irwin and her husband, Chandler Powell, have announced they are expecting their first child next year. "Baby Wildlife Warrior" is due in 2021, the couple said. "It's an to share this special moment in our lives with you," Irwin tweeted Tuesday. "Though I'm still in my first trimester, we really want you to be part of our journey from the beginning of this new life chapter. We couldn't wait to share the news as this beautiful little being has become the most important part of our lives."Powell tweeted that "becoming a dad is the highlight of my life.""I cannot wait to embark on this new adventure and life chapter with my gorgeous wife," his tweet said. Irwin, an Emmy-winning TV personality and conservationist, married Powell during a small ceremony at the Australia Zoo in March. Video below: Bindi Irwin marries Chandler Powell at Australia Zoo Terri Irwin also tweeted the news of her first grandchild, saying "This is the best day ever!""Words cannot express the love that is filling my heart," her tweet says. "While I wish that Steve was here to share this beautiful moment, I know that he would be so proud." Bindi's father, Steve Irwin, a beloved Australian zookeeper and TV personality, died in 2006 after an accident involving a stingray.