Capital One Cup
By Anthony Marshall - Newcastle United Managing Editor
At the MEMS Priestfield Stadium
The duo have both appeared off the substitutes' bench so far this season, and manager Alan Pardew has handed them starting spots in Kent against United's League One opponents.
De Jong is one of five full internationals starting for Newcastle at the MEMS Priestfield Stadium, as Pardew names a strong and experienced side for the cup tie - Tim Krul, Daryl Janmaat, captain Fabricio Coloccini and Moussa Sissoko the others.
And they will be providing the ammunition for front man Emmanuel Riviere, who arrived from Monaco in the summer.
On the substitutes' bench there are places for summer signings Remy Cabella, Ayoze Perez and Facundo Ferreyra, who join Yoan Gouffran, Vurnon Anita, Paul Dummett and Rob Elliot among the replacements.
Gillingham (3-5-2): Stephen Bywater; Kortney Hause, Leon Legge, John Egan; Matt Fish, Jake Hessenthaler, Bradley Dack, Josh Pritchard, Callum Davies; Danny Kedwell (c), Cody McDonald
Substitutes: Glen Morris, Gavin Hoyte, Brennan Dickenson, Luke Norris, Aaron Morris, Antonio German, Jermaine McGlashan
Newcastle United (4-2-3-1): Tim Krul; Daryl Janmaat, Steven Taylor, Fabricio Coloccini (c), Massadio Haidara; Moussa Sissoko, Mehdi Abeid; Gabriel Obertan, Siem de Jong, Rolando Aarons; Emmanuel Riviere
Referee: Oliver Langford (West Midlands)