The Royals have again exceeded expectations by following up last year's quarter-final appearance with another run to the last eight.
Central defender Mills was the match-winner last night as Reading stunned Premier League Everton 1-0 in their fifth-round tie at Goodison Park.
"We made it our mission at the end of the Villa game," said Mills. "The boys were obviously disappointed and we set a challenge to go one further this year.
"We are on course, although we've obviously got a tough one next, but we want to go to Wembley."
Source: PA
Source: PA