Old Trafford and Villa Park have been confirmed as the venues for this season's FA Cup semi-finals.
The tie between Watford and Man Utd, to be screened live on the BBC, will be played at Aston Villa's stadium on Saturday 14 April at 1730 BST.
In the second semi-final, Blackburn will face Chelsea on the following day at Manchester United's home, with the match kicking off at 1600 BST.
The ticket allocations for each club will be confirmed later this week.