Halle Berry

Olivier Martinez and Halle Berry are expecting a baby.

The couple is set to welcome their first child together this fall, Berry’s rep tells PEOPLE.

“I can confirm that Halle and Olivier are expecting a child,” the rep says.

“Halle is feeling great. It’s a very exciting time,” a source tells PEOPLE. “This happened naturally — everyone is really happy.”

“She always talks about being a mom and she definitely wanted this for a long time,” a friend adds.

Berry, 46, is already mom to 5-year-old daughter Nahla Ariela from her previous relationship with Gabriel Aubry.

After more than a year of dating, the Oscar-winning actress and Martinez, 47, were engaged in January 2012.

Last fall, Berry admitted that her little girl was hoping for a sibling.

“Every night, we do our prayers,” she explained at the time. “She says, ‘God, please bring me a bunk bed and a baby sister.’ And I say, ‘I can do one of those things, I know for sure. The other one, we’ve got to keep praying on.’”

With that prayer answered, Berry is focused on having a healthy nine months, as she did while expecting Nahla.

“My pregnancy was amazing. I was happy that whole time, I felt good, I had energy, I was like Superwoman,” she has said. “I wish I could feel like that for the rest of my life, that’s how fantastic it was.”