Rosie Huntington-Whiteley and Jason Statham are expecting their first child.
The 29-year-old model announced the news on Instagram by posting a photo of herself showing off her baby bump in a bikini on a beach.
She wrote: "Very happy to share that Jason and I are expecting!! Lots of love Rosie x."
The photo, which has been liked more than 250,000 times, was taken by 49-year-old actor Statham, she added.
Last summer, Huntington-Whiteley entered the world's highest-paid models list for the first time, above the likes of Kate Moss and Cara Delevingne.
The Plymouth-born model was in a tied fifth position with American model Gigi Hadid on the top 20 list compiled by Forbes.
Her estimated earnings are believed to be 9 million dollars (£6.8 million).
Statham is best known for his roles in various Guy Ritchie films, including Snatch and Lock, Stock And Two Smoking Barrels.
The couple have been together for around six years.