Helena Bonham Carter is pregnant.

The "Harry Potter" actress – who has two children with her film director partner Tim Burton, Billy, five, and 20-month-old Nell – sparked rumors she is expecting again after she was spotted wearing a succession of floaty outfits.

A source said: "Helena is definitely pregnant, and is really suits her. She has a neat little bump already, and seems to be glowing."

The 43-year-old actress was seen wearing a long, loose-fitting dress while book shopping in Malibu, where she is enjoying a family holiday.

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The brunette star was also seen sporting a red swimsuit during the vacation, which did little to conceal her growing curves.

Shortly before Nell's birth, Helena revealed she had struggled to fall pregnant a second time.

She tried fertility drugs and acupuncture, and was considering opting for IVF (in vitro fertilization) when she discovered she was expecting.

Helena explained: "I think we probably would have tried IVF, yes. Obviously, you don't know what you'd do unless you were actually in that situation."

"There was an argument for just having one child, because we thought if that's the way it's meant to be, so be it."