Megan Fox's husband Brian Austin Green has apparently confirmed they are expecting a baby together, with a teasing tweet.

The Desperate Housewives actor was pictured kissing the Transformer's beauty's belly as they holidayed on the Hawaiian island of Kona.

Brian replied on Twitter to the flood of congratulations messages: "Thank you everyone. We are so happy.

"By the way that last tweet does not confirm or deny anything :)"

Megan, 26, and Brian, 38, have been dating since 2004 and married in Hawaii in July 2010, with Kassius, Brian's son from a previous relationship, as the only guest.

Megan spoke earlier this year of becoming a mother. She said: "Of course. It will happen when it's meant to happen.

"I was a good babysitter. I've always loved babies. I relate to kids pretty well."

Brian, who found fame as David on Beverly Hills 90210, said: "She's an amazing stepmom. [My son] loves her. They have a great relationship. She's always had a special bond with him."