The 40-year-old actor, who married Lively in 2012 and have daughters James, two, and seven-month-old Ines together, gushed about his partner in a message posted on the Humans of New York's Instagram account at Met Gala.
"She always responds with empathy. She meets anger with empathy. She meets hate with empathy. She'll take the time to imagine what happened to a person when they were five or six years old. And she's made me a more empathetic person (sic)," Reynolds wrote.
The Canadian star said his actress wife encouraged him to open up about his past and his "fractured relationship" with his father James.