And what an impact he's made.
Parodied by a popular Twitter account for years, the Liverpool midfielder decided in March 2018 that "the 'Boring Milner' thing had gone on for a long time" and made his bow with a perfectly-pitched post.
Playing up his perceived reputation for a mundane life off the pitch, the Englishman simultaneously gave a glimpse of the dry, self-deprecating sense of humour that would go down a storm.
Hours later, he joined Instagram.
One year on, and two million combined social media followers later, we take a look at his funniest and most popular posts from the last 12 months...
April 2018
On his prosaic eye for precision...
May 2018
After Dejan Lovren's attempted clearance smashed into his head and rebounded into his own net during the Champions League semi-final second leg against AS Roma...
June 2018
On not making it into the photoshoots for Liverpool's kit launches...
July 2018
On having a kickabout on the tarmac while waiting for a plane on Liverpool's pre-season tour in the USA...
August 2018
After a collision with Napoli defender Mario Rui left him with a doppelganger of a head wound...
September 2018
On teammate Roberto Firmino turning up to training in protective glasses after suffering a minor eye injury...
October 2018
On trying to beat Adam Lallana at his own game in training...
November 2018
Some advice for Prince Charles as Sir Kenny Dalglish received his knighthood...
December 2018
His Christmas message...
January 2019
When 'Bezzie' Andy Robertson was rewarded with an extended contract...
February 2019
Channelling Eminem in response to a fan's Tweet entitled "I'm Too Good To Call Or Write My Fans" after not initially replying to his post asking how to buy a pair of Luis Suarez's under shorts...
March 2019
More banter with his mate Robertson...