1839: The trailblazer
The oldest existing photo selfie is thought to be by 30-year-old Robert Cornelius, who took it outside his lamp shop in Philadelphia.
He looks unsure whether the photo will work or not - unsurprising, as technology then meant that he would have had to have stood still for up to 15 minutes in order to get the shot.
2002: The word 'selfie' is finally invented
Australians are known for shortening words and putting "-ie" on them: "barbie", "tinnie", and "sunnies" are just some examples.
So it's unsurprising that the first recorded use of the word - short for self-portrait - is on an Australian online forum in 2002.
A guy called Nathan Hope posted a photo of his lip which he'd cut at a mate's 21st birthday, writing: "sorry about the focus, it was a selfie".
2013: Selfie is the word of the year
2014: Ellen breaks the internet
2014 Oscars host Ellen DeGeneres said she wanted to get the most retweeted photo ever.
Posing with a group of stars which includes Bradley Cooper, Jennifer Lawrence and Meryl Streep, she quickly achieved her wish.
She held the record for three years - until she was beaten earlier this year by a 16-year-old who wanted some chicken nuggets.