Octavia Spencer is a hardcore superfan. The celebrated actress isn't shy about expressing her love for the outdoorsy drama.Spencer spoke with ET's Matt Cohen on Tuesday, at the Los Angeles premiere of her new sci-fi drama and was asked about her outspoken appreciation for the Kevin Costner-led series.«Oh my gosh! Who's not [a fan]?» Spencer marveled when asked about some of the comments she's made, including on social media, about the show.