The supermodel-turned-actress and her fiance, James Bailey, are already proud parents to their 17-month-old son, Hunter.
And the 30-year-old star's manager has confirmed to US Weekly that the couple are set to welcome a baby daughter into the world in January.
Radiant: Devon Aoki is expecting a baby daughter with her fiance James Bailey in January 2013
Looking effortlessly chic in a pretty printed maxi dress, Devon was positively glowing as she chatted away on her mobile phone.
The New Yorker teamed her chic ensemble with a navy blue cardigan, a wide-brimmed hat and an oversized dark brown leather handbag.
Devon's modelling career kicked off at the tender age of 13 when she was spotted at a concert in New York.
Yummy mummy: The 30-year-old model-turned-actress looked effortlessly chic as she showed off her baby bump in a pretty patterned maxi dress in Beverly Hills, California, on Tuesday
Devon eventually went on to replace Naomi Campbell as the face of Versace and has also posed for such fashion giants as Chanel and Fendi.
She got engaged to James, an American financier, in January 2011, before the couple welcomed little Hunter into the world in June 2011.
James blogged at the time: 'Celebrating the birth of our son and Devon and my anniversary yesterday is more than I could ever ask for. Our family keeps growing.'
The star's acting credits include the movies 2 Fast 2 Furious and Sin City, and she is also an heiress to the Benihana restaurant fortune.
Mother-of-one: Devon already has a 17-month-old son, Hunter, with her fiance James Bailey