Allen and Lucas will line-up alongside Steven Gerrard in midfield, with Philippe Coutinho moving into a more advanced role alongside Luis Suarez and Raheem Sterling.
Sturridge is not fit enough to make the bench.
Liverpool: Mignolet, Johnson, Skrtel, Sakho, Flanagan, Gerrard, Lucas, Allen, Sterling, Coutinho, Suarez.
Subs: Jones, Toure, Agger, Cissokho, Moses, Alberto, Aspas.
Norwich City: Ruddy, Whittaker, Martin, Turner, Olsson, Johnson, Howson, Fer, Snodgrass, Redmond, Hooper.
Subs: Bunn, van Wolfswinkel, Gutierrez, Garrido, Bennett, Tettey, Murphy.
— Squawka Football (@Squawka) April 20, 2014