Nicole Richie Engagement Ring Photos

After three years and two kids together, Nicole Richie and Joel Madden are finally getting married!

In an appearance on the Late Show with David Letterman, airing this Friday - Nicole Richie confirmed her engagement to Joel Madden.

"You're not married yet, is that correct?" Letterman asked Richie.

"We're not married," she replied.

"Are you engaged? Are you planning to get married?" Letterman asked.

"We actually recently are engaged, yes," she replied.

Joel confirmed the news via Twitter:

"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."

"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."

A source says, "Nicole and Joel are in the process of planning the wedding. She's very involved in every detail. She's thrilled." The couple is expected to tie the knot in the summer.

Nicole, 28, and Joel, 30, are mom and dad to two little ones -- Harlow, 2, and Sparrow, five months.

Congratulations to Joel and Nicole!

See pictures of Nicole Richie's engagement ring.