Halle Berry Bump Growing: Star, 46, Keeps Fit During Pregnancy (PHOTO)

Halle Berry, who is expecting her first child with fiancé Olivier Martinez, officially debuted her baby bump Saturday.

Halle Berry was spotted over the past week showing off her growing baby bump. The "X-Men" actress has been keeping fit and was first spotted in a gym outfit with a tight gray top that made her bump evident. She also wore exercise gear while coming out in support of cancer research at the 20th Annual Entertainment Industry Foundation's Revlon Run and Walk for Women in Los Angeles; Berry is a Revlon spokeswoman.

Berry dressed her look up, debuting her bump in a more feminine way by wearing a black patterned summer dress while attending a birthday party. Berry attended the event with her daughter, Nahla, according to the Daily Mail.

The actress announced that she was pregnant last month, although the news came as a surprise.

"I was at the doctor's when they told me and I was completely shocked," she told Hello! magazine in April. "I didn't see it coming. I went to the doctor because I thought I had kidney stones or something."

But despite the surprise, Berry has also added in other interviews that news of her pregnancy has been much welcomed.

"I feel fantastic," she told CNN. "This has been the biggest surprise of my life to tell you the truth. I thought I was kind of past the point where this could be a reality for me. So it's been a big surprise and the most wonderful."

When news of the celebrity's pregnancy first broke, TMZ suggested that Berry was expecting a baby boy. Berry has yet to confirm that fact.

"I don't know, I don't know," she told CNN when asked about the sex of the baby. She added that her and her fiancé were both looking forward to becoming parents together.