Tom Franco, Brother of James and Dave. He acted professionally very briefly (Basket Case 2), but now he’s the co-director of Berkeley’s Firehouse Art Collective. Tragically, he also lost his wife in 2004 of liver failure. He married her in the hospital a month before she passed away.
Louisa Gummer, sister of Grace and Mamie Gummer, both actresses and the daughters of Meryl Streep. Louisa (right) is a model.
Luke Hemsworth, the brother of Chris and Liam. Luke (right) is also an actor, but his works seems to be limited to Australian TV.
Andrew Wilson, the brother of Luke and Owen. He’s actually a fairly prolific actor, but not particularly recognizable.
Peggy Schuyler, sister of Anjelica and Eliza Schuyler (who married Alexander Hamilton). If you haven’t seen Hamilton the play, no one would hold it against you for forgetting that Peggy is also in it.
Trey Smith, the older brother of Willow and Jaden Smith from Will Smith’s previous marriage to Sheree Zampino. He was in Smith’s music video, “Just the Two of Us.”
Cooper Manning, the older brother of Peyton and Eli Manning. Cooper was diagnosed with spinal stenosis in high school, ending his football-playing career. He’s a partner in an energy firm.
Lisa Roberts, the younger sister of Julia and Eric Roberts. Lisa is an actor and producer.
Kala Savage, the sister of Fred (The Grinder) and Ben (Girl Meets World) Savage, who is an actress.