Heidi Montag enjoys babymoon at 7 months pregnant

Aug. 10 (UPI) -- Mom-to-be Heidi Montag gave fans a glimpse into her tropical babymoon this week.

The 30-year-old reality star posted a photo Wednesday from her getaway to Hawaii with husband Spencer Pratt in late July.

"Babymoon!" she captioned a picture on Instagram of Pratt doing a pushup on the beach with her on his back.

Entertainment Tonight reported Montag wore a bikini from her The Hills co-star Audrina Patridge's swimwear line, Prey Swim, in the snapshot. The star was seven months pregnant at the time of the photo.

Montag announced her pregnancy in April, and confirmed the next month that she and Pratt are expecting a baby boy. She said in an interview with Us Weekly that it was "in [her] heart" to have a son.

"I thought Spencer really used to want a boy, and then a few months ago we had a conversation where he said, 'Let's just make sure it's healthy. Boy or girl, I don't care,'" the star recalled.

"I hope to have a little girl one day, but for my first child, I really wanted a son," she shared. "I thought it'd be a more natural bond for Spencer since he and his dad are so close."

Montag appeared on the MTV series Laguna Beach before starring with Pratt on The Hills. Her former co-star Lauren Conrad welcomed her first child, Liam James, with husband William Tell in July.