"Chandler and I are proud to announce that we’re expecting!" the 22-year-old wrote. "It’s an honour to share this special moment in our lives with you."
She added that, while she is still only in her first trimester of pregnancy, she couldn't wait to share the news with her fans.
She said: "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."