In 2004, Marvel used the title Astonishing X-Men for an ongoing X-Men series written by Joss Whedon and illustrated by John Cassaday. It is a continuation of Grant Morrison‘s New X-Men title and features a similar line-up of characters, including Cyclops and Emma Frost (as co-team leaders), Beast, Kitty Pryde, Colossus, Lockheed, and Wolverine. This team became the usual focus for most X-Men limited series published during Whedon’s run as well.