It's City who will go on to face the Latics after knocking out holders Chelsea in an entertaining match.
Read how an end-to-end match at Wembley unfolded in our minute-by-minute live updates below.
Chelsea: Turnbull, Terry, Ake, Lampard, Benayoun, Moses, Torres
City: Hart, Kolo Toure, Lescott, Kolarov, Garcia, Sinclair, Dzeko
Right now they're 10 minutes into the second half at the Britannia where it's Stoke 0-1 Man Utd. Michael Carrick scored the goal in the fourth minute and you can follow the remainder with Barney Corkhill by clicking here.
Chelsea beat Southampton 5-1 in January before struggling past League One side Brentford after a replay. Next up was a victory at Middlesbrough before the quarter-final victory over Manchester United. That one also required a replay.
The route to the last four has been much simpler for City. They are yet to concede a goal in this year's competition in their victories over Watford, Stoke, Leeds and Barnsley.