Nicole Richie and Joel Madden: Married!

Joel Madden and Nicole Richie have made it official.

The longtime partners and parents of two tied the knot Saturday in a lavish yet private ceremony at the Beverly Hills home of her father, Lionel Richie.

While the details are being kept under wraps, we do know there was an elephant in the room ... or at least outside of Lionel's estate. Really, there was.

Congratulations to the newlyweds!

Nicole Richie walked down the aisle in a Marchesa gown that was custom made in NYC, with celebrity hairstyle guru Byron Williams doing his thing.

Joel's twin brother Benji Madden took care of best man duties, while Samantha Ronson served as a bridesmaid in the musically inclined wedding party.

Her best friend Masha Gordon was the maid of honor, with the wedding party also including Joel and Nicole's adorable children Harlow and Sparrow.

Nicole's former BFF / Simple Life mate Paris Hilton was not in attendance, however. Benji was probably grateful to miss out on that awkward reunion.

Delivery trucks and other personnel swarmed Lionel's house all week and security was super tight, with the street around the estate closed to traffic.

As such, there's a surprising lack of photos of the guests - Gwen Stefani, Gavin Rossdale, Kris Jenner and others among them - making appearances.

Good for them, keeping it so private. Congratulations on pulling off that feat ... and on the momentous occasion itself! Nice job Joel and Nicole!