Nicole Richie & Joel Madden's Wedding Details

Nicole Richie and Joel Madden have put all their wedding plans in motion, and Radar Online has learned exclusively that the couple plan to marry in early December.

The former Simple Life star, 29, and her rocker fiancee, 31, are set to tie the knot before a star-studded guest list at the Beverly Hill home of Nicole's proud dad, music icon Lionel Richie.

"Christmas has always been about family and faith for Nicole and Joel, so there is not better time of the year for them to wed," an insider told Radar Online.

While the super-secret details of the couple's nuptials have not yet been released, Radar Online has learned that close pal Christina Aguilera and Lindsay Lohan's ex-lover Samantha Ronson are both planning to be in attendance.

The maid of honor will be Nicole's best friend, Masha Gordon, while the best man will be Joel's twin brother, Benji.

Nicole's daughter Harlow will serve as a flower girl.

Father Lionel will walk Nicole, the daughter he adopted, down the aisle, Radar Online is told.

The pair - who confirmed their engagement in February - have also engaged a top Hollywood event planner, the same woman behind the amazing nuptials of Khloe Kardashian, Jennifer Lopez and Aguilera.

Nicole and Joel are planning to invite about 75 family members and close friends to the garden wedding.

The lovebirds have been dating since late 2006 and have two children together - Harlow, 2, and one-year-old Sparrow.

Credit: Radar Online

Nicole Richie Welcomes New Member To Family

On Friday, Nicole Richie took to her Twitter page to announce that she and beau Joel Madden have welcomed a "new addition" to their "growing family": Tabitha Jones Madden, a cat.

Richie, 28, writes on her website that she found Tabitha crying outside her home "one dark and lonely night."

"At first, I thought it was Joel," says Richie, mother to daughter Harlow, 2, and son Sparrow (who turns 1 next month). "But to my surprise, there she was. A sad, and very hungry kitten."

Initially, she thought the cat belonged to her neighbor, so she ignored it.

A week later, the cat returned. "She was so skinny and I could tell she was starving," Richie writes. "I couldn't resist. I fed her, and she was as happy as Benji Madden in a sorority house. It's been 2 months now, so I think it’s safe to call her mine."

Credit: Us Magazine

Audrina Patridge Spotted With Benji Madden

The Hills star Audrina Patridge has reportedly been spotted kissing Good Charlotte guitarist Benji Madden who is confirmed to have been in London at the time.

The 25-year-old reality star recently confirmed she is dating her on-off lover BMX biker Corey Bohan again, but was recently spotted partying at Mahiki in London.

According to UK magazine Closer, Patridge was seen getting close with Paris Hilton’s ex-boyfriend Madden in a corner of the posh London club.

The two were also rumored to be dating last February.

Credit: Monsters & Critics