A Saturday Night Live (Snl) castmember who acted alongside Dakota Johnson in a controversial sketch about terrorist group Isis has come to the actress' defence after the skit sparked outrage.

The Fifty Shades of Grey star joined the cast of the U.S. comedy show on Saturday night (28Feb15) to take part in a number of sketches, and in one scene she took on the role of a woman who leaves her family to join the feared terror cell.

The skit sparked a major furore online, with many critics branding it tasteless and offensive, but Snl star Taran Killam, who played Johnson's onscreen father in the sketch, has now spoken out to defend his co-star and the show's writers.

In a post on Twitter.com, Killam shared a video of the Tv moment, and added, "Proud of this. Freedom to mock is our greatest weapon. Thanks to the writers who asked not to be mentioned by name."