10 Real-Life Celebrity Couples That Played Brother & Sister on Television

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On-screen relatives becoming off-screen couples is nothing new. One couple that is often highlighted in these instances is the pairing of Hayden Panettiere & Milo Ventimiglia, who famously dated from September 2007 to February 2009. Though, they were probably the subject of a lot of controversy more for their 12-year age gap — when she was 18, FYI — rather than the fact that they played niece & uncle on Heroes.

What’s a bit more rare, however, is when television siblings become a romantic pair IRL. Let’s break it down for you — here are 10 real-life celebrity couples that played brother & sister (albeit, not always related by blood) on the small screen: