Movember is an annual event involving the growing of moustaches during the month of November to raise awareness of men's health issues, such as prostate cancer, testicular cancer, and men's suicide. It is a portmanteau of the Australian-English diminutive word for moustache, "mo", and "November". The Movember Foundation runs the Movember charity event, housed at Movember.com. The goal of Movember is to "change the face of men's health."

By encouraging men (whom the charity refers to as "Mo Bros") to get involved, Movember aims to increase early cancer detection, diagnosis and effective treatments, and ultimately reduce the number of preventable deaths. Besides annual check-ups, the Movember Foundation encourages men to be aware of family history of cancer and to adopt a healthier lifestyle. Using the moustache as the driving symbol of the movement, Movember focuses on the three key areas of prostate cancer, testicular cancer, and mental health and suicide prevention. Since inception, the Movember Foundation has raised $837 million and funded over 1,200 projects in more than 20 countries.

Since 2004, the Movember Foundation charity has run Movember events to raise awareness and funds for men's health issues, such as prostate cancer and depression, in Australia and New Zealand. In 2007, events were launched in Ireland, Canada, Czech Republic, Denmark, El Salvador, Spain, the United Kingdom, Israel, South Africa, Taiwan and the United States. As of 2011, Canadians were the largest contributors to the Movember charities of any nation. In 2010, Movember merged with the testicular cancer event Tacheback.

In 2012, the Global Journal listed Movember as one of the world's top 100 NGOs (non-government organizations).

Seven Nightly News aired a story in 1999 including a group of young men in Adelaide, South Australia who coined the term "Movember" and the idea of growing moustaches for charity throughout the month of November. In the news report, members of the Adelaide-based "Movember Committee" explained how they came up with the idea for Movember one night in the pub. The group started with 80 men from Adelaide and soon became a nationwide phenomenon. They also aimed to raise money for the RSPCA through selling T-shirts in what they termed "Growing whiskers for whiskers".

In 2004, an unrelated group in Melbourne organised an event where 30 men would grow a moustache for 30 days in order to raise awareness for prostate cancer and depression in men. Adam Garone, Travis Garone, Luke Slattery, and Justin (JC) Coughlin inspired 26 other friends with a desire to "bring back" the trend of growing moustaches, the movement was born. The next year, nearly 500 people raised over $40,000 for the Prostate Cancer Foundation of Australia. At the time, it was the largest donation the PCFA had ever received. This group would later become the Movember Foundation charity. Three years after starting the Movember movement, the organization was granted official charity status in Australia.

The Movember Foundation has since raised $174-million worldwide, after spreading to South Africa and Europe, reaching North America in 2006. In 2009, Movember obtained official charity status in the United States. In 2010, participants in the United States alone raised over $7.5 million. In 2012, 1.1 million people signed up to participate, raising upwards of $95 million.

The charity launched The Moscars in 2010, an online global user-submitted video contest that helps Movember participants showcase their involvement in the movement. Submissions cannot be longer than 4 minutes each, and prizes can be won in several categories.