English actor Orlando Bloom and his wife Australian model wife Miranda Kerr are expecting their first baby, a source has revealed.

"She's definitely pregnant. Miranda's thrilled," a source close to Kerr said.

"She's telling all her friends, mostly other models, about it," the source added.

The source said that although there will be no official announcement, news of the couple's first child would be hard to keep under cover, reports the US Magazine.

"She poses in lingerie. It will be obvious soon enough," the source said.

Kerr has not kept her desire for a child a secret.

"I have always been very open about wanting to be a mother one day. And I've always thought Orlando would be a great dad," Kerr told an Australian newspaper. (ANI)