Sharing one or two physical traits with an older or younger brother or sister is nothing new, but for some siblings, the resemblance can be so strong that they look like twins even when they aren't. For us regular folks, this has little impact on our daily lives. However, for famous stars and their lookalike siblings, this could result in hilarious cases of mistaken identity. This was exactly what happened in July 2025 when a news website published a story about Nathan Fillion but accidentally used a picture of his radio host brother, Jeff Fillion, for the thumbnail. The "Castle" actor posted a screenshot of it on his Instagram, eliciting laughs and jokes from his followers. "Thank you, Info Petite Nation, for the lovely and flattering article on my career. My family really enjoyed it. Tha

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