The Hornets striker and captain initially joined the club in 2010 thanks to funds raised through an Elton John concert at Vicarage Road. Since then he has already made history.
Where to start with Troy Deeney.
The Birmingham-born forward was plucked out of West Midlands non-league football by Walsall in 2006 and went on to score 27 goals from just over 100 starts in three-and-a-half years with the Saddlers.
Signed by Watford for an initial £250,000 from Walsall on the eve of the 2010/11 season, Deeney was often deployed as a sub and asked to perform a bustling wide midfield role in his early days at Vicarage Road.
Deeney's most memorable goal in Watford colours remains his final strike of 20 during 2012/13. An unbelievable injury-time winner in the Championship Play-Off Semi-Final with Leicester City, dispatched just moments after Manuel Almunia's double-save from an Anthony Knockaert penalty, was truly the stuff of Hornets folklore.
Deeney then firmly etched his name in the Watford FC history books, becoming the first player in the club's history to hit over 20 goals in three successive seasons with a 21-goal haul in 2014/15.
The Golden Boys forward captained the Hornets to Premier League promotion, taking home both the Player and Players' Player Of The Season awards, and duly signed a new five-year contract ahead of the Premier League campaign that followed.
The number nine impressed in his opening season in the top flight of English football, captaining the side to a FA Cup Semi Final and scoring 15 goals in all competitions to help the Hornets secure their Premier League status for another season.
Deeney netted his 100th Hornets goal in the 1-1 Premier League draw with Crystal Palace on Boxing Day 2016, and again reached double figures in 2016/17.
In the 2017/18 season Deeney found the net on five occasions, including goals against Chelsea, Manchester United and Arsenal, and two important strikes against Everton and West Bromwich Albion at home that virtually ensured the Hornets' safety in the Premier League.
11 goals in the 2018/19 campaign - including a nerveless injury-time penalty against Wolverhampton Wanderers in the FA Cup semi-final - marked another successful season for the Hornets' talismanic captain as the Hornets reached a second FA Cup final in the club's history.