Elizabeth Hurley split with Hugh Grant last year
The 36-year-old is expecting a baby in April with her boyfriend, movie producer Stephen Bing.
The pregnancy was announced in a brief statement after growing speculation about her impending motherhood.
It said: "Elizabeth Hurley is delighted to confirm that she is expecting a baby in April and Stephen Bing is the father."
There had been several denials from the Hurley camp over suspicions of her pregnancy.
Photographs appeared of the star wearing baggy clothes covering a noticeable "bump", but the rumours were described as "vicious" gossip.
The former Estée Lauder model split with long-term partner Hugh Grant in May 2000.
Their separation after 13 years shocked the showbiz world.
'That dress'
But the pair have remained friends and still jointly run their production company Simian Films.
Hurley made a name for herself after appearing at the première of Grant's Four Weddings and a Funeral wearing the now famous Versace dress held together with safety pins.
Since then her own career has rocketed as she began to be offered big Hollywood roles.
Her big break came with the cult hit Austin Powers: International Man of Mystery.
She has since starred in movies such EdTV and Bedazzled.
But Hurley fell foul of US acting unions last year after breaking a strike by appearing in commercials, for which she was fined £70,000 by the Screen Actors' Guild.
She apologised for breaking the strike but said she had been unaware that it was going on.
Her long-term contract as the face of Estée Lauder came to an end this year after she was replaced by 26-year-old model Carolyn Murphy.