In a story published Monday in Britain’s Daily Mail, columnist Richard Kay reported that Grant got down on one knee on a trip to Barbados six months ago.
"It's one of the best-kept secrets of the celebrity world," he wrote. Sure is. The couple’s reps refuse any comment, and friends and family maintain they either don't know or won’t say.
Engaged or not, the longtime bachelor, 45, and his lady, 32, seem quite smitten. "They get along marvelously," says a Khan pal, dismissing other recent rumors claiming a rift.
In the last month Grant and Khan have been spotted snogging everywhere from Venice to New York City, where a ringless Khan shopped on June 5.
Their chemistry isn’t just physical, either. "He’s very clever, and she really is funny, witty and quick," says her friend. "They spark off each other perfectly."