The 2018 FA Cup final between Chelsea and Manchester United will kick off at 17:15 BST on 19 May.
The match at Wembley will be broadcast live on BBC One and BBC Radio 5 live.
Manchester United, who have won the trophy 12 times, reached a record-equalling 20th final by coming from behind to beat Tottenham 2-1 on Saturday.
Michael Oliver will referee the final and the Football Association has confirmed the video assistant referee (VAR) system will be used for the first time in a FA Cup final, with Neil Swarbrick taking the role.
Wembley holds 90,000 people and each set of fans will be allocated over 28,000 tickets.
The final is a repeat of 2007 when current United boss Mourinho guided the Blues to a 1-0 victory after extra time in the first final to be played at the rebuilt Wembley.
The two sides also faced each other in the 1994 final, when United won 4-0.