Sir Alex Ferguson has changed up his team shape for the biggest match of the season. Manchester United normally play in a 4-4-1-1 with Wayne Rooney in the hole behind a dedicated striker, but it looks like they're shoring up the midfield here, with Park Ji-Sung appearing in midfield as the visitors arrive in what appears to be a 4-3-3. Manchester City, meanwhile, throw out their usual shape, with the controversial figure of Carlos Tevez anchoring the forward line.
Manchester City (4-2-3-1): Joe Hart; Gael Clichly, Joleon Lescott, Vincent Kompany, Pablo Zabaleta; Gareth Barry, Yaya Toure; Samir Nasri, Carlos Tevez, David Silva; Sergio Aguero.
Substitutes from: Costel Pantilimon, Micah Richards, Edin Dzeko, Aleksandar Kolarov, Mario Balotelli, Jamies Milner, Nigel de Jong.
Manchester United (4-3-3): David de Gea; Patrice Evra, Rio Ferdinand, Chris Smalling, Phil Jones; Park Ji-Sung, Michael Carrick, Paul Scholes; Ryan Giggs, Wayne Rooney, Nani.
Substitutes from: Dimitar Berbatov, Javier Hernandez, Ashley Young, Danny Welbeck, Rafael da Silva, Antonio Valencia, Ben Amos.
For live coverage of tonight's match, check out the Manchester Derby StoryStream. You can also can the low down on the two teams at United blog The Busby Babe and City blog Bitter and Blue.