Will Kirby Is Engaged to Erin Brodie
08/23/2011 AT 05:30 PM EDT
"I'm so fortunate to be in a relationship with Erin," Kirby tells PEOPLE exclusively. "I'm thrilled to now open the next chapter of our lives together."
The two had a romantic, beachside dinner at sunset Tuesday of her favorite foods: lobster, grilled prawns, oysters and a tomato salad. Then Kirby presented Brodie with a 9-carat diamond band set in platinum, and popped the question.
Kirby, a board-certified dermatologist in Beverly Hills, and Brodie, who works at a Fortune 500 software company, live in California and have a 15-month-old son together, Cash.
They have yet to set a date.