Documentaries have become increasingly popular over the years, offering viewers a unique glimpse into real-life stories, historical events, and important issues. As we look back at the most watched documentaries of all time in 2025, we see a diverse range of topics that have captured the attention of audiences worldwide. From nature to music, from social issues to personal stories, these films have left a lasting impact on viewers and continue to be celebrated for their storytelling and insight.
Let’s explore the top 10 most-watched documentary movies of all time, as of 2025.
1. Planet Earth II (2016)
This stunning nature documentary series, narrated by the legendary David Attenborough, takes viewers on a breathtaking journey across the world’s most incredible landscapes and habitats. With its groundbreaking cinematography and captivating stories of wildlife, Planet Earth II has become a favorite among viewers of all ages.
The series showcases the beauty and diversity of our planet, from the highest mountains to the deepest oceans. It also highlights the challenges faced by animals in their natural habitats, raising awareness about conservation and environmental issues.
2. The Social Dilemma (2020)
This eye-opening documentary explores the impact of social media on our society and personal lives. Through interviews with former employees of major tech companies, The Social Dilemma reveals the hidden mechanisms behind popular social media platforms and their effects on mental health, politics, and human behavior.
The film has sparked important conversations about digital privacy, addiction to technology, and the need for more responsible practices in the tech industry. Its message has resonated with viewers around the world, making it one of the most watched and discussed documentaries of recent years.
3. March of the Penguins (2005)
This heartwarming nature documentary follows the yearly journey of emperor penguins in Antarctica. Narrated by Morgan Freeman in the English version, the film captures the incredible determination and resilience of these amazing creatures as they brave harsh conditions to mate and raise their young.
March of the Penguins has touched the hearts of millions with its beautiful cinematography and touching story of survival and family bonds in one of the world’s most challenging environments.
4. They Shall Not Grow Old (2018)
Directed by Peter Jackson, this powerful documentary brings World War I to life through restored and colorized footage. The film offers a unique and deeply moving perspective on the experiences of soldiers during the Great War, using modern technology to make century-old footage feel immediate and real.
They Shall Not Grow Old has been praised for its innovative approach to historical documentaries and its ability to connect modern audiences with the human stories behind one of history’s most devastating conflicts.
5. Free Solo (2018)
This thrilling documentary follows rock climber Alex Honnold as he attempts to scale El Capitan in Yosemite National Park without any ropes or safety gear. Free Solo is a breathtaking exploration of human determination, risk-taking, and the pursuit of seemingly impossible goals.
The film’s stunning visuals and nail-biting climax have made it a favorite among adventure enthusiasts and general audiences alike. It also raises thought-provoking questions about the nature of passion and the limits of human achievement.
6. The Last Dance (2020)
This ten-part documentary series chronicles the career of basketball legend Michael Jordan, with a focus on his final season with the Chicago Bulls. The Last Dance combines rare footage with candid interviews to paint a comprehensive picture of one of the greatest athletes of all time and the team that dominated basketball in the 1990s.
The series has been celebrated for its in-depth look at Jordan’s career, the inner workings of a championship team, and the cultural impact of basketball during this era. Its appeal extends beyond sports fans, offering insights into leadership, teamwork, and the price of greatness.
7. Blackfish (2013)
This controversial documentary examines the treatment of orca whales in captivity, focusing on the case of Tilikum, an orca involved in the deaths of several people at SeaWorld. Blackfish sparked a major public debate about the ethics of keeping intelligent marine mammals in captivity for entertainment purposes.
The film’s impact went beyond viewership numbers, leading to significant changes in how the public perceives marine parks and influencing policies regarding the captivity of orcas. It stands as a powerful example of how documentaries can drive real-world change.
8. The Act of Killing (2012)
This unique and disturbing documentary explores the 1965-66 Indonesian genocide by having former death squad leaders reenact their crimes in the style of their favorite Hollywood genres. The Act of Killing offers a chilling look into the minds of those who committed mass murder and the society that has allowed them to remain unpunished.
The film’s unconventional approach and unflinching examination of a dark chapter in history have made it one of the most talked-about documentaries of the past decade. It challenges viewers to confront difficult questions about human nature, violence, and historical memory.
9. Sly Lives! (2025)
This recent addition to the list explores the life and legacy of music legend Sly Stone. Directed by Questlove, Sly Lives! (also known as The Burden of Black Genius) offers a deep dive into the career of Sly and the Family Stone, one of the most influential bands of the late 1960s and early 1970s.
The documentary features interviews with music icons like Andre 3000, D’Angelo, and Chaka Khan, providing insight into Sly Stone’s groundbreaking music and his impact on popular culture. It also explores the challenges he faced, including struggles with substance abuse and the pressures of fame.
Sly Lives! has been praised for its honest portrayal of a complex artist and its exploration of themes like creativity, fame, and the role of Black artists in shaping American music. Its popularity reflects a growing interest in music documentaries that go beyond simple biography to examine broader cultural and social issues.
10. An Inconvenient Truth (2006)
This groundbreaking documentary features former U.S. Vice President Al Gore as he campaigns to educate the public about the dangers of global warming. An Inconvenient Truth played a significant role in bringing climate change to the forefront of public consciousness and political debate.
The film combines scientific data with personal anecdotes to create a compelling argument for urgent action on climate change. Its impact has been long-lasting, inspiring many viewers to become more environmentally conscious and spurring discussions about sustainability and environmental policy.
Bottom Line
the most-watched documentaries of all time as of 2025 offer a window into what captivates and moves global audiences. From nature and music to social issues and historical events, these films demonstrate the power of documentary storytelling to inform, inspire, and sometimes even change the world. As viewers, we are fortunate to have access to such a rich and diverse range of true stories, beautifully told through the art of cinema.