It's been quite a year for new joiners...
As hard as it is to believe, not every single celebrity in the world is on Instagram. And 2015 was the year that everyone from Adele to David Beckham decided to join in the Insta-fun, by creating their own accounts and uploading their very first photos to the social media giant.
We also saw from Caitlyn Jenner and Zayn Malik, who kicked off their Insta-careers with shots of themselves covering magazines, while brothers Liam and Chris Hemsworth opted for more tongue-in-cheek starting photos.
Game Of Thrones actress Emilia Clarke also joined, as well as one unexpected entity - the Royal Family.
Scroll down to see which photos 2015's biggest additions chose to make their entrance...
Caitlyn Jenner - @caitlynjenner 5.3m followers
'Everybody has challenges in dealing with life. I'm so happy after such a long struggle and finally living my true self. Welcome to the world Caitlyn. It feels so good. Can't wait for you to get to know her/me.' Zayn Malik - @zayn 4.8m followers
Check out my cover of @interviewmag's September issue.
Adele - @adele 3.2m followers
25 out November 20th
David Beckham – @davidbeckham 16.1m followers
Good morning and hello! It’s great to finally be on Instagram, been a long time coming but I can’t wait to start sharing all my special moments with you. Thank you for all your birthday messages so far. Looking forward to a great day with friends and family x
Emilia Clarke - @emilia_clarke 1.8m followers
#lol
Liam Hemsworth - @liamhemsworth 1.2m followers
Spent Friday with the most beautiful girl in the world. Kermit, #SorryNotSorry. #TheMuppets #misspiggy Chris Hemsworth - @chrishemsworth 1m followers
Hangin' with the locals in my backyard… the real Jurassic Park!
The Royal Family - @kensingtonroyal 757k followers
Prince Harry, joined by NBA All-star Carmelo Anthony, presented the first #Coachcore programme graduates with their certificates at St James's Palace today. #Coachcore is a programme developed by the #RoyalFoundation to train young people who are struggling to find positive prospects, to become professional sports coaches and mentors.
Salma Hayek - @salmahayek 635k followers
So, I'm just learning the #selfie thing, obviously I suck! My jaw looks huge and deformed, PLEASE help me with some tips! #SalmaHayak #AWEurope Prince - @prince 162k followers
PURPLE SILHOUETTE
Celine Dion - @celinedion 152k followers
Hello Instagram! / Bonjour Instagram! #firstselfie Ryan Reynolds - @vancityreynolds 1.5m followers
Stuck the landing. With my mouth.
Robert Downey Jr. - @robertdowneyjr 4.4m followers
Come get me, Instagram...
Which do you think was the most memorable moment of 2015? Let us know @marieclaireuk