As the saying goes, you can't teach an old dog new tricks.
While that's certainly been the case for some of the Premier League's more senior head coaches, a handful have stayed at the highest level well beyond their so-called twilight years.
Cardiff City boss Neil Warnock recently became just the fourth Premier League manager to still be active at the age of 70, and here's a list of the six other oldest top flight managers ever.
7. Dick Advocaat - 68 Years, 6 Days
Dick Advocaat didn't get off to best start at the Stadium of Light in 2015 when his side lost on the road to West Ham, but Jermain Defoe's goal in the derby against Newcastle United two weeks later helped breathe some confidence back into Sunderland.
The Black Cats registered two more wins and three draws to retain their Premier League status during the 2014/15 season, but a poor start the following campaign saw Advocaat lose his job as Sunderland had just three points on the board by the start of October.
6. Arsène Wenger - 68 Years, 258 Days
Few managers will ever find themselves immortalised in Premier League history quite like Arsène Wenger.
Having taken over Arsenal in 1996, Wenger took charge of 1206 games for the Gunners before eventually walking away from north London at the end of last season.
Wenger enjoyed tremendous success during his first decade with Arsenal and he would eventually leave the club with three Premier League titles, seven FA Cups and seven Community Shields under his belt.
On top of that, Wenger's tactics and dietary demands - which seemed alien in English football at the time - revolutionised the modern game and it could certainly be argued that Premier League football wouldn't be at the level it is now without the Frenchman.
5. Guus Hiddink - 69 Years, 188 Days
Dutch manager Guus Hiddink is the first on this list who has had two separate spells in the Premier League, both of which came in west London with Chelsea.
His first spell with the Blues came to a cruel end despite securing them an FA Cup trophy, while Hiddink's second time at Stamford Bridge came knowing that his position was only as the caretaker manager and he was replaced by Antonio Conte in 2016.
4. Neil Warnock - 70 Years, 4 Days
Cardiff City boss Neil Warnock might be the first on this list to break the 70 years old mark, but incredibly the former Sheffield United and Crystal Palace manager isn't the oldest active manager in the Premier League.
Warnock guided his team a mid-table finish in the Championship during his first season in charge, having taken over in South Wales in 2016. The following season, Cardiff would find themselves gain automatic promotion back to the Premier League following a four-year hiatus from the top flight.
Ages accurate as of December 5, 2018.
3. Roy Hodgson - 71 Years, 118 Days
Roy Hodgson's appointment at Crystal Palace last year didn't come with the usual feeling that usually does the rounds when an experience manager gets appointed in the Premier League.
Hodgson was born in Croydon and came through the ranks of Crystal Palace as a player, before eventually leaving 1966. Fifty-one years later, following a managerial career that took him from Malmö to Inter, Hodgson was appointed as Frank de Boer's successor.
Crystal Palace finished the season with more than enough breathing space between them and the relegation zone, ending up floating around in mid-table. Things have started slowly for Hodgson this year, but few consider the Eagles to be serious relegation candidates this season.
Age accurate as of December 5, 2018.
2. Sir Alex Ferguson - 71 Years, 139 Days
By and large, English football fans can't stand Manchester United, especially when thinking of them back during their heyday under Sir Alex Ferguson.
Was that because they were a bad team? Nope. Was it because they played bad football? Not at all. It was just because they were so much better than everyone else, and simply beating them felt like a trophy for every other team in the league.
Almost 27 years after taking over at Old Trafford, Sir Alex was given a hero's send off by Manchester United. The Scotsman won a Premier League trophy every other season in the north west, as well as two Champions League titles and 23 other honours, ranging from the FA Cup to the UEFA Super Cup.
1. Sir Bobby Robson - 71 Years, 191 Days
The word 'legend' is flung around all too often in modern football, but that phrase doesn't even come close to describing the one and only Sir Bobby Robson.
From Newcastle to Catalonia, few people are held in as higher regard as Sir Bobby. On top off all of his achievements with Barcelona, PSV Eindhoven and the English national team, the iconic head coach also holds the record as the oldest manager ever in the Premier League.
He eventually called time on his managerial career in 2004 following a five-year spell with Newcastle United. Four years later, Sir Bobby announced that he had been diagnosed with terminal lung cancer, and less than 12 months after that, football sadly lost one of its biggest ever icons.