Ford, 66, surprised Flockhart, 44, with an engagement ring on Valentine's Day weekend while the two were away on a family vacation with son Liam.
Reps for the couple did not return calls.
The couple has been together for seven and a half years. No wedding date has been set yet.
Bruce Willis Gets Hitched:
People: Talk about a family affair!
The small wedding ceremony took place at the actor's home in Parrot Cay, Turks & Caicos.
Also present among the small group of guests were Moore and Willis's daughters, Rumer Willis, 20, Scout, 17, and Tallullah Belle, 15.
The wedding coincided with Willis's birthday: The actor turned 54 on Thursday. Heming is 32.
The couple, who met through mutual friends, have been together for more than a year and will be having a civil ceremony when they return to California, according to the actor's rep.
Natasha Bedingfield Walks Down the Aisle:
"Our wedding day was everything we'd hope it would be," said the 27-year-old bride. "It was simple, beautiful and natural. Free from trappings or formalities, it was more about expressing our love for one another in front of those we hold dearest to us than anything else."
Bedingfield wore a cream silk Vera Wang dress and H. Stern jewelry while the groom wore Armani. The 30-minute ceremony took place in front of about 150 guests at the Church Estates Vineyards, which hosted Fergie and Josh Duhamel's February nuptials.
The newlyweds dated for two years before announcing their engagement in 2008.