(KTLA) – Actress Megan Fox announced that she and her fiancé Machine Gun Kelly are expecting their first child together. The "Transformers" star revealed her bump and a positive pregnancy test in an Instagram post Monday afternoon. "Nothing is ever really lost. Welcome back," she wrote in the caption alongside an angel emoji. She also tagged Machine Gun Kelly, born Colson Baker, in the post. Mattel apologizes for X-rated ‘Wicked’ doll mishap The pregnancy comes after the couple experienced a miscarriage. Fox opened up about the experience in her poetry book "Pretty Boys Are Poisonous" in November 2023. She wrote about having an ultrasound of a baby girl at 10 weeks and a day. "I want to hold your hand, hear your laugh," she wrote. "But now I have to say goodbye." Megan Fox, left, and Machine Gun Kelly arrive at the Billboard Music Awards on May 15, 2022, at the MGM Grand Garden Arena in Las Vegas. (Photo by Jordan Strauss/Invision/AP) Fox said in an interview with Good Morning America that she had never gone through "anything like that" in her life. "I have three kids, so it was very difficult for both of us," she said during the interview last year. "And it sent us on a very wild journey together and separately…trying to navigate, 'What does this mean?' and 'Why did this happen?'" Machine Gun Kelly opened up about the pregnancy loss through music. During the 2022 Billboard Music Awards, he dedicated his performance of the song "Twin Flame" to Fox and their "unborn child." Then, in February 2024, he released "dont let me go," where he sang: "How can I live with the fact, that my hand wasn't on her stomach when we lost the baby." Fox has three children with her ex-husband, "Beverly Hills, 90210" actor Brian Austin Green. Machine Gun Kelly also has one child with his ex, Emma Cannon.