MARK SELIGER

Alexandra Helen Lenas and Sean Nicholas Parker pose for their wedding photo in a romantic, magical setting at The Ventana Inn in Big Sur, Calif.

He’s gone from Facebook to a wedding book.

Social media genius Sean Parker, who created Napster and was founding president of Facebook en route to amassing a $2 billion fortune, permanently friended Alexandra Helen Lenas Saturday, tying the knot in front of 300 close friends and family members in what one Parker associate described as a “romantic, magical” setting in a forest behind the Ventana Inn in Big Sur.

“People entered down a long trail and came to a big gate and entered this other world in a forest there,” says one insider of the $9 million affair attended by Sting and Trudie Styler, Sean Lennon, Jane’s Addiction singer Perry Farrell, Newark mayor Cory Booker and actress Allison Williams.

“It was almost out of a fairy tale,” another attendee gushed.

Sky-high redwoods served as a backdrop for the fancy fete, which was rumored to have been medieval-themed, though our insider assures us that was not the case at all. Instead, we’re told the entire ceremony was quite tasteful and elegant.

“It started late afternoon, then there was a sunset, then it went into dark,” says our spy. “There was extraordinary lighting. They made the forest come alive.”

The bride wore Elie Saab while the groom was outfitted by Academy Award winner Ngila Dickson, best known for her Oscar-winning work on “Lord of the Rings: Return of the King.”

Dickson also dressed the flower girls and Parker and Lenas’ 5-month-old daughter Winter. The ceremony was officiated by Unitarian Universalist minister John A. Buehrens and coordinated by a team including celebrity party planner Preston Bailey — who made headlines in February when he got married in a “King Kong”-themed ceremony that took place atop the Empire State Building and was presided over by Joan Rivers.

Parker, 33, and Lenas, 24, had been engaged for two years before officially changing their status to married. The pair maintain a residence on W. 10th St., but insiders say they were intent on marrying in Big Sur, where one of their wedding speakers, a local resident, thanked them for breathing needed revenue into the local economy.

TATUM DATUM: THEY’RE PARENTS

People magazine’s “Sexiest Man Alive” is now also the sexiest dad alive. Channing Tatum and Jenna Dewan-Tatum became proud parents on May 30 in London according to rival Us Weekly. Tatum, 33, and Dewan-Tatum, 32, reportedly met on the set of “Step Up” in 2006 and married in 2009. The mag was unable to confirm the newborn’s gender Sunday and reps for the pair didn’t respond to our request for comment.

KHLOE TRIMS HER SAILS

Why does Khloe Kardashian look so fit, trim and happy these days? We’re going to assume it’s due to a healthy diet of Confidenti@l. Sure we question her sister Kim’s bizarre “maternity wear” from time to time (as in almost every single day), but her big sis didn’t seem to hold any grudges May 29 while reading our Kimsanity! item about Kim K retweeting old photos of herself that were submitted by fans.

PHOTOS: INSIDE KIM KARDASHIAN AND KANYE WEST’S BABY WORLD

WE’RE SURE THERE WAS PUNCH

British boxing champion Amir Khan and his fiancée, Faryal Makhdoom, got hitched in New York Saturday in an extravagant wedding where guests were banned from taking photos. Sources tell Confidenti@l that all cell phones were confiscated when guests entered the Waldorf-Astoria for the $1 million ceremony. Khan wore a gold robe and carried a gold sword. He was later seen pulling the sword out to show boxing promoter Richard Schaefer. The couple will return to England for a second wedding before flying out to Kuala Lumpur for their honeymoon.

NO HORSING AROUND

New York’s beautiful set flocked to New Jersey for Saturday’s Sixth Annual Veuve Clicquot Polo Classic, which polo stud Nacho Figueras co-hosted, but couldn’t play, due to a recent injury. “It’s tough but so is life,” he told Confidenti@l. Adding sobriety to injury, Figueras couldn’t drink the sponsor’s free Champagne either. Citing his crutches, the Argentine jock joked, “I have to stay awake.” Matthew McConaughey, Ashley Olsen and Rosario Dawson were among the crowd of 7,000 that crossed the Hudson.