The actor, who shares three children with ex-husband Brian Austin Green, is expecting her first baby with boyfriend Machine Gun Kelly.

Megan Fox has "learned all the tricks" of pregnancy now that she is expecting baby number four. The 38-year-old actress - who has sons Noah, 12, Bodhi, 10, and Journey, eight, with ex-husband Brian Austin Green - recently announced she is pregnant with her and fiance Machine Gun Kelly's first child and explained that she is just trying to do everything she can to make sure she is both "physically and mentally" well.

The “Jennifer’s Body” actress is a proud mom to sons Noah, 12, Bodhi, 10, and Journey, 8, whom she shares with ex-husband Brian Austin Green, 51.

The Transformers star's revelation comes weeks after she announced on social media that she is expecting her first child with the Bloody Valentine singer.

"The kids are all super excited for another addition to the family and have promised to help out and pitch in," Fox shares with PEOPLE. Fox's new little one joins her three sons a

While most people know Megan Fox as a famous sex symbol from her role as Mikaela Banes in the 2007 live-action Transformers movie, there's more to the Hollywood star than meets the eye. Not only was she named one of the most beautiful women in the world for the better part of two decades,

The celebrity couple is expecting their first child together, and sources believe the pregnancy is a 'desperate' attempt to 'hang on' to their relationship.

Megan Fox and Machine Gun Kelly are "very excited" to welcome their first baby together, a source exclusively tells PEOPLE. "They can't stop talking about the baby," the insider says.

In an interview with PEOPLE, Megan Fox opened up about how her children reacted to the news of her pregnancy, and got candid about her "maternity style."

Adding a fourth (or fifth, or sixth) baby isn’t just “one more.” It changes your family dynamics, stretches your time, and shifts your perspective on motherhood in ways you might not expect.