The baby bump is one of Hollywood's most fashionable accessories, and Megan Fox flaunted hers while on a Hawaiian vacation with hubby Brian Austin Green, according to pictures posted on PopSugar.

Fox had been keeping her pregnancy hush-hush the last few weeks, hiding her growing tummy under loose T-shirts and baggy clothing, but she finally let the paparazzi have their day, allowing pictures of her bump to be snapped while celebrating her anniversary and pregnancy on her vacation with Green.

Fox is clearly proud of her changing body, as she donned a bikini for the pictures and glowed as Green kissed her growing mid-section.

The couple were married in Hawaii two years ago and returned to celebrate their anniversary.

But their relationship has not always been sunshine and daisies. They began dating in 2004, but broke up in 2009 after a two-year engagement. When they had been apart for a short time, the couple reunited and married soon after.

The two of them are either putting on a show for the cameras, or they really can't get enough of each other. Fox and Green portray a deep connection in all the photos that seems to have been fortified by Fox's pregnancy.

The Hollywood couple has not publicly spoken about the pregnancy, but when Fox, 26, was promoting her latest film, Friends With Kids earlier in the year, she told Cosmopolitan magazine she had a deep desire to have children.

I want at least two, probably three [kids], she explained to the magazine. I've always been maternal.

Since the lovebirds have been so tight-lipped about the pregnancy, it's not definite how far along Fox is into her pregnancy or the gender of their child.

Though this will be the first time experiencing parenthood for Fox, it's nothing new for Green.

He shares a 10-year-old son, Kassius, with General Hospital actress Vanessa Marcil.