updated 02/16/2010 AT 6:05 AM ET
•originally published 02/15/2010 AT 9:35 PM ET
“Yep. i’m engaged. Very happy. Yeah we’ve been engaged for a while so your all kind of late on that. But Thanks for the hooplah all the same,” Madden Tweeted Monday night, after news of their plans to wed went wide. He also expressed thanks to relatives who did not let word of the engagement slip.
He Tweeted: “P.s. thats why i love my family and friends. None of them are sources. All good tight lipped people who let us enjoy it! Thanks everybody”
Richie said Monday night during a taping of the Late Show with David Letterman that the couple are engaged to be married, a source told PEOPLE.
After the show, Richie headed to the New York restaurant Abe & Arthurs – without her fiancé – for dinner. She was glowing, says a source. She was telling her table how happy she was.
And while they’ve been living as a close-knit family, as recently as October Richie dashed engagement rumors. “One day I would love to get married,” she said. “It’s not something we’re talking about right now. If my kids ask me to get married, I’d get married.”