5 Hidden Details In The Harry Potter HBO TV Series Trailer

HBO has released a new Harry Potter TV series trailer, and we've picked out five things you might have missed when watching it.

The top 3

Bestselling Harry Potter Book by Copies Sold: "Harry Potter and the Philosopher's Stone" (also known as "Harry Potter and the Sorcerer's Stone" in the US) is the bestselling individual book in the series, with over 120 million copies sold worldwide.
Highest-Grossing Harry Potter Film Worldwide: "Harry Potter and the Deathly Hallows – Part 2" is the highest-grossing film in the franchise, earning over $1.34 billion worldwide.
Most Successful Harry Potter Spin-off Film: "Fantastic Beasts and Where to Find Them" (2016) is the highest-grossing spin-off film in the Wizarding World franchise, earning $814 million worldwide.