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Resisting prankage is futile! James Franco posted an Instagram pic of a comically unfounded article that claimed his younger bro, Dave, was dating Neighbors costar Zac Efron. "Effron [sic] and My brother, dating!!!!!!" the older Franco captioned the photo, clearly teasing. "Congrats, boys! I'm so happy for you!!!"
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SUPPORT YOUR YOUNGER SIB'S DREAMS
When Brad Pitt's younger brother, Doug, was offered a role in an Australian Virgin Mobile ad campaign in 2012 – which eventually went viral – he called his big bro to see what he thought. "He was like, 'Do it. It sounds great!'" Doug recalled. When the final product hit, Brad texted him encouraging words: "Hey, just saw it. Hilarious."
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BEING PROUD IS WAY EASIER THAN BEING JEALOUS
Josh Hutcherson is constantly bragging about his super-brainy younger brother, Connor, who received a perfect score on the ACTs and now studies biochemistry.
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CALL YOUR SIB OUT WHEN NECESSARY
In a 2012 Hollywood Reporter video, Ben Affleck reflected on casting his younger brother, Casey, in his directorial debut Gone Baby Gone. For one scene, after Ben told Casey to just "follow [his] instincts," Casey's instincts were to just walk into a different room, where there were no cameras. "Everyone's standing there filming an empty hallway," he recalled. "'What are you doing? Don't walk into another room!'"
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BE A TEAM
Willow and (big bro) Jaden Smith, both musicians and part-time philosophizers, are a total team. "I think Willow's had a huge evolution," Jaden said in a 2014 T Magazine interview, before going on to discuss their musical collaborations, proving they're definitely a "we." "She freestyles and finds out what she likes. Same thing with me … Honestly, we're just trying to make music that we think is cool."
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PREP FOR DISAGREEMENTS
You may be in charge most of the time, but as a big brother, you're also a target. When younger brother Luke was directing Owen Wilson in The Wendell Baker Story in 2008, Owen was being difficult on set, so Luke asked their other brother – Andrew, the oldest of them all – to get in Owen's face. "I can't, you're bigger than he is, just kick his ass," Luke recalled saying. "Just kick his ass, man."
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EMBRACE THE AGE HIERARCHY – YOU'RE ON TOP
As the baby of the family, Liam Hemsworth was subject to all sorts of cruel antics devised by older brothers Chris and Luke. In a 2013 Details interview, Chris recalled wrapping up Liam in heavy sweaters and giving him a head start, while he and Luke would "stalk him around our backyard with air rifles and shoot him. I feel like the worst brother in the world. But we had a great time, okay?"