Leicester, which never won the FA Cup, had the best of a chance in the first half and could have gotten ahead of close to the half-hour mark when Jamie Vardy came in behind the Saints defense, but the shot jumped from him missed. deviated from the arc. distant post.
Iheanacho’s hit put the Foxes in front early in the second half when he rebounded his own shot from Jamie Vardy’s cutout and placed his second down on Fraser Forster to give Brendan Rodger’s team the lead.
Leicester will play Chelsea, who beat Manchester City 1-0 in the other semi-final on Saturday, in the FA Cup final at Wembley on 15 May.
A limited number of fans are expected to be able to enter Wembley for the final after a crowd of around 4,000, mainly local residents, attended the semi-final as part of a test event for the return of the crowds as they diminish. COVID-19 restrictions.