Alex O'Loughlin and girlfriend Malia Jones are expecting

"Hawaii Five-0" star Alex O'Loughlin and his girlfriend, model Malia Jones, are about to be parents.

The couple, who have been together for the better part of a year, are expecting their first child together, E! Online reports. Both have sons from past relationships -- O'Loughlin has a 15-year-old named Saxon, and Jones a 3-year-old, Spike, with ex-husband Luke Stedman.

O'Loughlin is currently filming Season 3 of "Five-0," which is scheduled to premiere Sept. 24 on CBS. He starred opposite Jennifer Lopez in "The Back-up Plan" and in the short-lived CBS vampire show "Moonlight" and had a recurring part on "The Shield."

Jones, who like O'Loughlin is 35, is a model and former competitive surfer who's appeared in a number of commercials and has been named to People's "50 Most Beautiful" list.

There's no word on a due date for the baby.