The Big Game is an annual rugby union match hosted by Harlequins during the Christmas holiday season each year. As of 2011 for sponsorship purposes it is known as The LV= Big Game. It is one of Harlequins' regular home matches in the Aviva Premiership but it is moved from their usual home ground at the Twickenham Stoop (14,816 capacity) to the much larger Twickenham Stadium (82,000 seats).
There are other high-profile matches in London between the capital's rugby clubs at other times, particularly the London Double Header at Twickenham and Saracens' European or Premiership games at Wembley Stadium.