That is how many have applied for tickets to see their teams play the all-German final - yet most will be disappointed, with each club having just 25,000 tickets to sell to fans.
Dortmund had received 502,567 requests for tickets by the time of Sunday's deadline for the open draw, with priority given to members and season-ticket holders, while Bayern received around 250,000 orders for tickets with only members even allowed to apply.
Tickets for Wembley cost between €72 and €396 (£60-£334) while both clubs are limiting each successful applicant to a maximum of two tickets. Bayern's draw has been made open only to fans who are registered members of the Bavarian giants' 3,000 different supporters' groups.
"Due to the large numbers of orders, it is not possible to make it an open draw for all fans - a strict criteria and a drawing of lots is the only fair way of dividing up the allocation," said a Bayern Munich spokesman.
This is the first time two German clubs have reached the European Cup final. Bayern, who beat Barcelona 7-0 on aggregate in their two-legged semi-final, are through to their third final in four seasons but last won the Champions League title back in 2001.
Dortmund, who beat Real Madrid in the last four, are in their first final since winning the trophy in 1997.
Airline firm German Wings have said they will put on special chartered flights from Dortmund and Cologne/Bonn airports on the day of the Wembley final for German supporters.