Joe Marler (born 7 July 1990) is a rugby union player for Harlequins in the Aviva Premiership playing primarily as a Prop. At the start of his Harlequins career he was sent out on loan to Esher and Worthing for a season each. Marler was called up to the England U20's squad for the 2009 U20 Six Nations, but was injured throughout. He was called up to represent England U20's throughout the Junior World Championship in summer 2009. He started his career at Heathfield & Waldron RFC in East Sussex.
The following season he was again called up into the U20 squad, and marked his 6N debut against Wales with two tries. He made his Guinness Premiership debut for Harlequins at the end of that season.
He was called into the England squad for the 2010 end of year tests as injury cover for David Wilson. When Wilson recovered, Marler was kept on alongside him in the squad. He eventually made his test debut against South Africa where he started two test matches at loose-head prop in the summer of 2012.
Marler started for England against Scotland at Twickenham in the 2013 Six Nations, and was substituted after 55 minutes. On 4 August 2014 Harlequins named Joe as their new captain, replacing Chris Robshaw due to his commitments as England captain in the 2015 World Cup year.