Although Castle star Molly Quinn has developed a very special bond with her on-screen dad Nathan Fillion, no one — not even Rick Castle himself — could ever compare to her real dad, whom she tweeted about over Easter weekend.

"My real life dad is Castle to the power of 10," she wrote on April 8. "He appreciates @NathanFillion being my LA dad."

Credit: Twitter Photo: Molly Quinn's Real Dad Poses With Her On-Screen Dad, Nathan Fillion

When Wetpaint Entertainment caught up with Molly last year at San Diego Comic-Con, she gave us even more insight into their special father-daughter relationship, saying, "I love my dad. I've always been a daddy's girl. We did everything together."  

When Molly met Nathan on the set of Castle back in 2009, she immediately felt comfortable working alongside the veteran actor because he reminded her so much of her father. Funny enough, some of the framed pictures of Richard and Alexis inside the Castle loft are actually of Molly and her real-life dad.

"My dad looked so much like Nathan when he was younger!" she dished. 

And the similarities don't end there — turns out, Nathan is quite the protective fake pops. "If I bring a guy I'm dating on set … he says this to my mom … 'Every time I know that Molly's dating a guy, I just want to break his legs.'" 

Makes Richard Castle's severed heads seem like a piece of cake!

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