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PHOTO: George Lucas And Wife Have Baby

It's been a big year for George Lucas! Not only did he marry his longtime girlfriend, Mellody Hobson, in June, but now, he has a new baby too.

Everest Hobson Lucas was born on Aug. 9, via a surrogate, a rep for the filmmaker confirmed to ABC News. The newborn is the couple's first child together, though Lucas has three adult children too.

The real surprise, though, may be that the new parents managed to keep secret that they were even expecting until after the baby's arrival. For stars, whose private lives are often on public display, the fact that they can keep such huge news under wraps is a real accomplishment.

Lucas and Hobson are the latest celebrities to pull of such a feat. Click through to see more:

Jimmy Fallon and Nancy Juvonen

Jimmy Fallon surprised the world with the news that he and his wife, producer Nancy Juvonen Fallon, the co-owner of Flower Films with Drew Barrymore welcomed a baby girl via a surrogate. "It wasn't really a secret but my wife and I had been trying for a while to have a baby," the "Late Night with Jimmy Fallon" host said of their daughter, whom they named Winnie. "We've tried a bunch of things, so we had a surrogate."

See Celebs Who Share Royal Baby Birthday

Nicole Kidman and Keith Urban

The day after the 2011 Golden Globes, Nicole Kidman and Keith Urban shared some surprising news with the world: they had secretly welcomed their second daughter, Faith Margaret, on Dec. 28, 2010, born to a surrogate in their adopted hometown of Nashville. According to People magazine, the couple, who also are parents to daughter Sunday Rose, kept many friends and family in the dark before finally revealing their secret.

"No words can adequately convey the incredible gratitude that we feel for everyone who was so supportive throughout this process, in particular our gestational carrier," the couple said in a statement.

Elizabeth Banks

"Hunger Games" actress Elizabeth Banks also used a surrogate to carry her baby boy Felix after years of trying to conceive with husband Max Handelman and experiencing what she called "broken belly." But she didn't share the news until after her newborn baby had arrived, tweeting to her followers: "What's greater than overjoyed? Megajoyed? Add humility, love, awe. Sprinkle w cute. Result: my new life as a mom."

Charlize Theron

Oscar-winning actress Charlize Theron surprised the world last March when she became a single mom after adopting son Jackson. Though the news of her new status may have come as a surprise, Theron hinted in August 2011 that she was eager to become a mom. She told Germany's In Touch magazine, "I want a baby. If it would happen tomorrow I would be very happy." She previously spoke out about adoption, saying, "There are so many unwanted children on this earth and it's our job to care for them. And if we don't we're doing the world a disservice."

Sandra Bullock

Sandra Bullock was able to keep the mother of all secrets -- that she had adopted son Louis Bardo Bullock -- in the midst of awards season and the collapse of her marriage to Jesse James in 2010. The Oscar-winning actress did such a good job of keeping secret the baby she adopted in January 2010 before finally telling the public in April 2010 that even she was surprised. "I don't know how we got away with it," Bullock told People magazine, crediting friends and family with keeping her secret.

In hindsight, she may have dropped a hint about her new bundle of joy during her acceptance speech for best actress for her role in "The Blind Side" that year. "I would like to thank what this movie was about for me, which are the moms that take care of the babies and the children no matter where they come from," she said.

Connie Britton

Another Hollywood single mom, Connie Britton adopted son Eyob from Ethiopia in 2011 without letting the tabloids catch wind of her new addition until he was safe and sound at home. Afterward, she told People magazine that adopting "Yoby" was a dream three years in the making. "It was such a wonderful moment of completion," she said about the day she arrived in Ethiopia to bring him home. "I was just grinning from ear to ear."

Viola Davis

Leave it to Octavia Spencer to reveal her "Help" co-star Viola Davis' secret: that she was a new mom to daughter Genesis. At the Elle Women in Hollywood event in October 2011, Spencer spilled the beans while honoring her friends when she said that Davis had become a mom "like, two days ago." The new mom confirmed the news in her acceptance speech, People said.

But for those who had been paying attention, Davis and her actor husband Julius Tennon had revealed their intention that August at "The Help" premiere, when she told a reporter on the red carpet, "We're about to adopt a baby."

Steve Martin

What's more surprising than Steve Martin becoming a first-time dad at 67: the comedian and his wife Anne Stringfield keeping it a secret for a couple of months. Martin's rep confirmed the news to People in February 2013, saying the couple "are new parents and recently welcomed a child" after the New York Post broke the news that the baby was born last December.

A couple months after the pair's announcement, Martin divulged details about the baby to Dave Letterman. Asked about the baby's name, Martin replied, "Conquistador," pronouncing it "con-queest-a dor."

"What do you think? I didn't want to go with one of those Hollywood weird names," Martin added. "Conquistador says... It's a statement."

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