Celebrity Siblings Are A Hit in Hollywood

These 21 photos of the entertainment world's most celebrated stars prove fame is often a family affair.

These 21 photos of the entertainment world's most celebrated stars prove fame is often a family affair.

Pop icons Janet and the late Michael Jackson grew up together in the wacky world of show business. "When I was 14 years old, I would shop for him," Jackson reveals of her then 21-year-old big brother. "I washed his clothes, cleaned his room. When Mother would go out of town, she'd say, 'I'm leaving you in charge. Take care of Mike.'"

From red carpets to far-flung destinations, hotel heiress sisters Nicky and Paris Hilton have become inseparable as adults. "The girls didn't used to get along that well, and now they really love each other," the girls' mom, Kathy Hilton, has said.

Derek and Julianne Hough have made names for themselves as professional dancers. "Our home videos are pretty self-evident that these kids loved to shake, rattle and roll," their proud papa, Bruce Hough, reveals of the Dancing with the Stars pros.

It's only appropriate that identical twin sisters Tamera and Tia Mowry found fame on the TV sitcom Sister, Sister. Now they're both busy in their roles as moms. "It would be interesting if we end up getting pregnant together—that would be crazy cool in a way," says Tamera.

The Kardashian klan—Kourtney, Khloe and Kim—have grown rich and famous together. "Khloe will say crazy things, Kourtney doesn't care and I am just embarrassed by everything," Kim explains of what makes them different from each other.

Ashlee Simpson followed closely in her singing sister Jessica Simpson's footsteps, though she sported an edgier style. "Ashlee likes to test the waters more than Jessica," their mom, Tina Simpson, has noted.

Actors and brothers Joe and Nick Manganiello teamed up professionally to produce La Bare — a documentary about male dancers at a Dallas strip club.

Siblings John and Joan Cusack got their first taste of moviemaking thanks to film critics Roger Ebert and Gene Siskel, who they used to watch on TV growing up in Chicago.

Hilary and Haylie Duff enjoyed lots of downhome meals together in Texas. "I grew up in a household where we cooked all the time," says Hilary. "My mom cooked all the time, my dad cooked. My grandmothers cooked."

Just because Liam and Chris Hemsworth are brothers doesn't mean they always see eye-to-eye. "We're competitive as siblings are in everything from sport, to backyard cricket to football to surfing to who's controlling the remote control when we're watching TV," says Chris.

Brandy doesn't even want to think about the fact that her younger brother Ray J made a sex tape with her former stylist and friend, Kim Kardashian. "I'm not pissed," she has insisted. "Ray J is Ray J…He does what he does."

The Baldwins—Billy, Stephen, Alec and Daniel—have all taken their turn in the spotlight with varying degrees of success. "Growing up Baldwin was like the Brady Bunch on a whole bunch of espresso," says Stephen of his famous family.

The Jonas brothers—Kevin, Joe and Nick—may be going in different directions in their careers, but they will always remain tight.

After the infamous elevator incident, everyone now knows Solange Knowles will always have her big sister Beyonce Knowle's back. But it used to be the other way around. "My sister was very protective of me, and we were very sweet with each other," says Solange. "I'm sure if we were closer in age we wouldn't have gotten along so great. But we've been super-close ever since I was about 13."

Anyone who wants to date Jake Gyllenhaal has to be approved by his big sister, Maggie Gyllenhaal. "Women have to pass her test," says the actor. "That's very hard for girlfriends. But I love that about Maggie."

Sporty sisters Venus and Serena Williams are both having a ball as titans of the tennis world.

Actor Mark Wahlberg and New Kids On The Block singer Donnie Wahlberg were raised in the once rough and tumble world of the Dorchester neighborhood in Boston. "Where I grew up—and even in my family—it wasn't like 'Am I going to smoke pot or do drugs when I grow up?' It was, 'At what age am I going to start?' That was the question," says Donnie. "It wasn't 'Am I going to be arrested?' It was, 'When?'"

Luke Wilson and his older brother Owen Wilson were close as kids back in Austin, Texas. "We just get along really well together," says Luke. "And growing up, I was kind of a shy kid, so I would always hang around Owen, and his friends became my friends."

Aaron Carter missed his brother Nick Carter's April 2014 wedding because his private plane had mechanical issues. "Really pissed off that I missed my brothers wedding today," Aaron wrote. "I hope he doesn't hate me…I tried to get there…I'm sorry bro."

Brothers Charlie Sheen and Emilio Estevez have both played the son of their real life dad, Martin Sheen, on the big screen.

Kendall and Kylie Jenner may not be as big as their half-sisters, the Kardashians, but they're already starting to successfully play the fame game together—from launching a clothing line to partying with famous pals.